Discussion Devil Fruit Discussion Thread

[Erinyes]

Oh Pudding Memo memo no mi, and Viola's giro giro are also great options

I forgot a lot of interesting fruits, so decide to list* them here so you can click the link and check the ones youd like to pick. (source : picked the lists from wikia)

*listed only canon fruits.

paramecia

Paramecia fruits​

• Gomu Gomu no Mi (English versions: Gum-Gum Fruit): Turns the user's body into rubber, giving them the power to stretch, bounce, and inflate; as well as make them immune to electricity and near impervious to blunt-force attacks and bullets. Eaten by Monkey D. Luffy.
• Bara Bara no Mi (English versions: Chop-Chop Fruit): Allows the user to split their body into separate pieces, which the user can manipulate and make fly through the air. It also makes them immune to slashing attacks. Eaten by Buggy.
• Sube Sube no Mi (English versions: Slip-Slip Fruit/Smooth-Smooth Fruit): Makes the user's skin extremely smooth and slippery, causing things to slide off them. Eaten by Alvida.
• Bomu Bomu no Mi (English versions: Bomb-Bomb Fruit/Boom-Boom Fruit): Allows the user to create explosions from their body, as well as give explosive properties to their bodily secretions. Also makes the user immune to explosions. Eaten by Gem.
• Kiro Kiro no Mi (English versions: Kilo-Kilo Fruit): Allows the user to increase or decrease their body weight at will. Eaten by Mikita.
• Hana Hana no Mi (English versions: Flower-Flower Fruit): Allows the user to sprout duplicates of their body parts from any nearby surface. Eaten by Nico Robin.
• Doru Doru no Mi (English versions: Wax-Wax Fruit): Allows the user to create and control candle wax. Eaten by Galdino.
• Baku Baku no Mi (English versions: Munch-Munch Fruit): Allows the user to eat anything and transform their body to match the qualities of what they've recently eaten. Eaten by Wapol.
• Mane Mane no Mi (English versions: Clone-Clone Fruit): Allows the user to transform into a physical lookalike of another person. Eaten by Kurozumi Higurashi until her death and later eaten by Bentham.
• Supa Supa no Mi (English versions: Dice-Dice Fruit): Allows the user to transform any part of their body into a blade, thus gaining slashing abilities and making their skin as hard as steel. Eaten by Daz Bonez.
• Toge Toge no Mi (English versions: Spike-Spike Fruit): Allows the user to grow spikes from their body. Eaten by Zala.
• Ori Ori no Mi (English versions: Cage-Cage Fruit/Bind-Bind Fruit): Allows the user to create iron bindings on their opponents. Eaten by Hina.
• Bane Bane no Mi (English versions: Spring-Spring Fruit/Boing-Boing Fruit): Allows the user to turn their limbs into springs. Eaten by Bellamy.
• Ito Ito no Mi (English versions: String-String Fruit): Allows the user to create and control strings. Eaten by Donquixote Doflamingo.
• Noro Noro no Mi (English versions: Slow-Slow Fruit): Allows the user to emit special photons that slow down anything they touch for 30 seconds. Eaten by Foxy.
• Doa Doa no Mi (English versions: Door-Door Fruit): Allows the user to create and open doors on anything, including walls, living beings, and the even the air itself. Eaten by Blueno.
• Awa Awa no Mi (English versions: Bubble-Bubble Fruit): Allows the user to create and control soap bubbles that can clean anything, including strength. Eaten by Kalifa.
• Beri Beri no Mi (English versions: Berry-Berry Fruit): Allows the user to split their body into many spheres. Eaten by Very Good.
• Sabi Sabi no Mi (English versions: Rust-Rust Fruit): Allows the user to rust anything they touch, including organic material. Eaten by Shu.
• Shari Shari no Mi (English versions: Wheel-Wheel Fruit): Allows the user to turn their limbs into wheels. Eaten by Sharinguru.
• Horo Horo no Mi (English versions: Hollow-Hollow Fruit): Allows the user to create and control ghosts. The ghosts cause despair in the people they touch and are capable of self-destructing. The user can also make their own ghost leave their body. Eaten by Perona.
• Yomi Yomi no Mi (English versions: Revive-Revive Fruit): Allows the user to return to life after dying once already, as well as allow the user to make their returned soul temporarily leave their reanimated body. Eaten by Brook.
• Kage Kage no Mi (English versions: Shadow-Shadow Fruit): Allows the user to manifest and control shadows. Eaten by Gecko Moria.
• Suke Suke no Mi (English versions: Clear-Clear Fruit): Allows the user to become invisible, as well as make anything they touch invisible. Eaten by Absalom until his death and later eaten by Shiryu.
• Nikyu Nikyu no Mi (English versions: Paw-Paw Fruit): Gives the user paw pads on their hands that can repel anything they touch. Eaten by Bartholomew Kuma.
• Ope Ope no Mi (English versions: Op-Op Fruit): Allows the user to generate a sphere-like room, inside which they can manipulate anything. Eaten by Trafalgar D. Water Law.
• Shiro Shiro no Mi (English versions: Castle-Castle Fruit): Allows the user to become a living fortress equipped with cannons, as well as letting them shrink people and objects and house them inside their body. Eaten by Capone Bege.
• Wara Wara no Mi (English versions: Straw-Straw Fruit): Allows the user to create and control straw. They can attach other people's life forces to straw dolls, allowing the damage they take to transfer to the dolls and the people connected to them. Eaten by Basil Hawkins.
• Mero Mero no Mi (English versions: Love-Love Fruit): Allows the user to turn people that feel attraction for them into stone. Eaten by Boa Hancock.
• Doku Doku no Mi (English versions: Venom-Venom Fruit): Allows the user to create and control poison. Eaten by Magellan.
• Horu Horu no Mi (English versions: Horm-Horm Fruit): Allows the user to create special hormones and inject them into a persons body, changing their biochemistry. Eaten by Emporio Ivankov.
• Choki Choki no Mi (English versions: Snip-Snip Fruit): Allows the user to transform parts of their body into scissors. Anything cut by these scissors briefly gains the properties of paper. Eaten by Inazuma.
• Gura Gura no Mi (English versions: Tremor-Tremor Fruit): Allows the user to create quakes and shockwaves. Considered to be the most powerful Paramecia. Eaten by Edward Newgate and later stolen from him by Marshall D. Teach upon his death.
• Kira Kira no Mi: Allows the user to transform their body into diamond. Eaten by Jozu.
• Woshu Woshu no Mi (English versions: Wash-Wash Fruit): Allows the user to literally wash and fold a person as if they were laundry. It also makes the victim's heart cleaner. Eaten by Tsuru.
• Fuwa Fuwa no Mi (English versions: Float-Float Fruit): Allows the user to fly and make non-living things they touch levitate. Eaten by Shiki.
• Mato Mato no Mi (English versions: Mark-Mark Fruit): Allows the user to mark a person as their target by touching them so that any weapon thrown with that same hand will chase after the marked target. Eaten by Vander Decken IX.
• Fuku Fuku no Mi (English versions: Garb-Garb Jutsu): Allows the user to create clothing. Eaten by Kin'emon.
• Hobi Hobi no Mi (English versions: Hobby-Hobby Fruit): Allows the user to turn people into subservient toys, simultaneously erasing any memory of the victim from the minds of others. It also halts the user's aging. Eaten by Sugar.
• Buki Buki no Mi (English versions: Arms-Arms Fruit): Allows the user to transform their body into any kind of weapon. Eaten by Baby 5.
• Guru Guru no Mi (English versions: Spin-Spin Fruit): Allows the user to make any part of their body spin like a propeller. Eaten by Buffalo.
• Beta Beta no Mi (English versions: Stick-Stick Fruit): Allows the user to create and control mucus. Eaten by Trebol.
• Zushi Zushi no Mi: Allows the user to manipulate gravity. Eaten by Issho.
• Bari Bari no Mi (English versions: Barrier-Barrier Fruit): Allows the user to create barriers. Eaten by Kurozumi Semimaru until his death and later eaten by Bartolomeo.
• Nui Nui no Mi (English versions: Stitch-Stitch Power): Allows the user to stitch things together. Eaten by Leo.
• Giro Giro no Mi (English versions: Glare-Glare Fruit): Allows the user to see through solid objects, as well as read people's minds and memories. Eaten by Viola.
• Ato Ato no Mi (English versions: Art-Art Fruit): Allows the user to transform people and objects into art. Eaten by Giolla.
• Jake Jake no Mi (English versions: Jacket-Jacket Fruit): Allows the user to transform into a jacket and control the body of the person wearing them. Eaten by Kelly Funk.
• Pamu Pamu no Mi (English versions: Pop-Pop Fruit): Allows the user to expand and rupture their body, as well as any inorganic object they touch. Eaten by Gladius.
• Sui Sui no Mi (English versions: Swim-Swim Fruit): Allows the user to swim freely in the ground and walls. Eaten by Senor Pink.
• Ton Ton no Mi (English versions: Ton-Ton Fruit): Allows the user to drastically increase their body weight. Eaten by Machvise.
• Hira Hira no Mi (English versions: Ripple-Ripple Fruit): Allows the user to give anything they touch the properties of fabric, making it thin, flexible, and fluttering. Eaten by Diamante.
• Ishi Ishi no Mi (English versions: Stone-Stone Fruit): Allows the user to assimilate into and control stone. Eaten by Pica.
• Nagi Nagi no Mi (English versions: Calm-Calm Fruit): Allows the user to nullify sounds. Eaten by Donquixote Rosinante until his death.
• Chiyu Chiyu no Mi (English versions: Heal-Heal Fruit): Allows the user to heal people's wounds. Eaten by Mansherry.
• Soru Soru no Mi (English versions: Soul-Soul Fruit): Allows the user to extract people's souls and use them to bring objects to life. Eaten by Carmel until her death and later eaten by Charlotte Linlin.
• Mira Mira no Mi (English versions: Mirror-Mirror Fruit): Allows the user to create mirrors that reflect attacks and act as entrances to the Mirro-World. Eaten by Charlotte Brûlée.
• Pero Pero no Mi (English versions: Lick-Lick Fruit): Allows the user to create and control candy. Eaten by Charlotte Perospero.
• Bisu Bisu no Mi (English versions: Bis-Bis Fruit): Allows the user to create and control biscuits. Eaten by Charlotte Cracker.
• Bata Bata no Mi (English versions: Butter-Butter Fruit): Allows the user to create and control butter. Eaten by Charlotte Galette.
• Buku Buku no Mi (English versions: Book-Book Fruit): Allows the user to manipulate books, as well as trap people inside them. Eaten by Charlotte Mont-d'Or.
• Kuri Kuri no Mi (English versions: Cream-Cream Fruit): Allows the user to create and control cream. Eaten by Charlotte Opera.
• Shibo Shibo no Mi (English versions: Wring-Wring Fruit): Allows the user to drain liquid from people and objects. Eaten by Charlotte Smoothie.
• Memo Memo no Mi (English versions: Memo-Memo Fruit): Allows the user to manipulate people's memories. Eaten by Charlotte Pudding.
• Mochi Mochi no Mi (English versions: Mochi-Mochi Fruit): Allows the user to create, control, and transform into mochi. Eaten by Charlotte Katakuri. This Devil Fruit is noted to be a "special Paramecia".
• Hoya Hoya no Mi (English versions: Puff-Puff Fruit): Allows the user to summon a genie from their body. Eaten by Charlotte Daifuku.
• Netsu Netsu no Mi (English versions: Heat-Heat Fruit): Allows the user to emit high heat from their body. Eaten by Charlotte Oven.
• Kuku Kuku no Mi (English versions: Cook-Cook Fruit): Allows the user to transform objects into food. Eaten by Streusen.
• Gocha Gocha no Mi: Allows the user to fuse themselves with other people. Eaten by Charlotte Newshi.
• Oshi Oshi no Mi (English versions: Push-Push Fruit): Allows the user to manipulate the ground as if it were made of clay. Eaten by Morley.
• Kobu Kobu no Mi (English versions: Pump-Pump Fruit): Allows the user to rally people into fighting and awaken their latent potential. Eaten by Belo Betty.
• Toki Toki no Mi (English versions: Time-Time Ability): Allows the user to send themselves and others forward in time. Eaten by Kozuki Toki until her death.
• Juku Juku no Mi (English versions: Ripe-Ripe Jutsu): Allows the user to mature and decay inanimate objects. Eaten by Shinobu.

Unnamed Fruits

• Eustass Kid's fruit which allows him to manipulate magnetic forces.
• Jewelry Bonney's fruit which allows her to manipulate the age of any person, including herself.
• Scratchmen Apoo's fruit which allows him to morph body parts into instruments and use music as a weapon.
• Urouge's fruit which allows him to convert damage taken into strength, resulting in expanding muscles.
• Blamenco's fruit which creates pockets in his body that can store things such as a giant hammer.
• Sanjuan Wolf's fruit that makes him bigger than regular giants.
• Kurozumi Kanjuro's fruit that allows him to bring whatever he draws to life. Like Kin'emon, he refers to it as sorcery.
• Tama's fruit that allows her to create dango from her cheeks that make any animal that eats them tame and subservient.

zoan

Zoan fruits

​

Ushi Ushi no Mi (Ox) series

• Ushi Ushi no Mi, Model: Bison (English versions: Ox-Ox Fruit/Ox-Ox Fruit, Bison Model/Ox-Ox Fruit, Bison Form) - Allows the user to become a full bison or a half-bison hybrid. Eaten by Dalton.
• Ushi Ushi no Mi, Model: Giraffe (English versions: English versions: Ox-Ox Fruit, Giraffe Model/Ox-Ox Fruit, Model: Giraffe) - Allows the user to become a full giraffe or a half-giraffe hybrid. Eaten by Kaku.

Hito Hito no Mi (Human) series

• Hito Hito no Mi (English versions: Human-Human Fruit) - Allows any animal that eats it to get human characteristics like Tony Tony Chopper did when he ate the fruit.
• Hito Hito no Mi, Model: Daibutsu (English versions: Human-Human Fruit, Daibutsu Model/Human-Human Fruit, Model: Buddha) - Allows the user to become a Daibutsu (a giant gold Buddha) or a half-Daibutsu hybrid. Eaten by Sengoku.

Tori Tori no Mi (Bird) series

• Tori Tori no Mi, Model: Falcon (English version: Tweet-Tweet Fruit, Falcon Type/Bird-Bird Fruit, Model: Falcon) - Allows the user to become a full falcon or a half-falcon hybrid. Eaten by Pell.
• Tori Tori no Mi, Model: Phoenix - Allows the user to become a full phoenix or a half-phoenix hybrid. Eaten by Marco.
• Tori Tori no Mi, Model: Albatross - Allows the user to become a full albatross or a half-albatross hybrid. Eaten by Morgans.

Inu Inu no Mi (Dog) series

• Inu Inu no Mi, Model: Dachshund (English version: Mutt-Mutt Fruit/Mutt-Mutt Fruit, Dachshund Form/Dog-Dog Fruit, Model: Dachshund) - Allows the user to become a full dachshund or a half-dachshund hybrid. In the case of Babe's bazooka-like gun Lassoo, he became a dachshund/gun hybrid.
• Inu Inu no Mi, Model: Jackal (English version: Mutt-Mutt Fruit: Jackal Strike/Dog-Dog Fruit, Model: Jackal/Mutt-Mutt Fruit: Jackal Model) - Allows the user to become a full jackal or a half-jackal hybrid. Eaten by Chaka.
• Inu Inu no Mi, Model: Wolf (English version: Mutt-Mutt Fruit: Wolf Model/Dog-Dog Fruit, Model: Wolf) - Allows the user to become a full wolf or a half-wolf hybrid similar to a werewolf. Eaten by Jabra.
• Inu Inu no Mi, Model: Tanuki - Allows the user to become a full tanuki or a half-tanuki hybrid. In the case of Tenguyama Hitetsu's teapot Bunbuku, he becomes a tanuki/teapot hybrid.
• Inu Inu no Mi, Model: Kyubi no Kitsune (English version: Dog-Dog Fruit, Model: Nine Tailed Fox) - Allows the user to become a full nine-tailed fox or a half-nine-tailed fox hybrid, and allows the user to become perfect clones of other people. Eaten by Catarina Devon.

Neko Neko no Mi (Cat) series

• Neko Neko no Mi, Model: Leopard (English version: Cat-Cat Fruit, Model: Leopard) - Allows the user to become a full leopard or a half-leopard hybrid. Eaten by Rob Lucci.

Zou Zou no Mi (Elephant) series

• Zou Zou no Mi (English version: Elephant-Elephant Fruit/Eleph-Eleph Fruit) - Allows the user to become a full elephant or a half-elephant hybrid. In the case of Spandam's sword Funkfreed, he becomes an elephant/sword hybrid.
• Zou Zou no Mi, Model: Mammoth (English version: Elephant-Elephant Fruit, Model: Mammoth) - Allows the user to become a full mammoth or a half-mammoth hybrid. Eaten by Jack.

Ryu Ryu no Mi (Dragon) series

• Ryu Ryu no Mi, Model: Allosaurus (English version: Dragon-Dragon Fruit, Model: Allosaurus) - Allows the user to become a full Allosaurus or a half-Allosaurus hybrid. Eaten by X Drake.
• Ryu Ryu no Mi, Model: Spinosaurus (English version: Dragon-Dragon Fruit, Model: Spinosaurus) - Allows the user to become a full Spinosaurus or a half-Spinosaurus hybrid. Eaten by Page One.
• Ryu Ryu no Mi, Model: Pteranodon (English version: Dragon-Dragon Fruit, Model: Pteranodon) - Allows the user to become a full Pteranodon or a half-Pteranodon hybrid. Eaten by King.
• Ryu Ryu no Mi, Model: Brachiosaurus (English version: Dragon-Dragon Fruit, Model: Brachiosaurus) - Allows the user to become a full Brachiosaurus or a half-Brachiosaurus hybrid. Eaten by Queen.

Hebi Hebi no Mi (Snake) series

• Hebi Hebi no Mi, Model: King Cobra (English version: Snake-Snake Fruit, Model: King Cobra) - Allows the user to become a full king cobra or a half-king cobra hybrid. Eaten by Boa Marigold.
• Hebi Hebi no Mi, Model: Anaconda (English version: Snake-Snake Fruit, Model: Anaconda) - Allows the user to become a full anaconda or a half-anaconda hybrid. Eaten by Boa Sandersonia.
• Hebi Hebi no Mi, Model: Yamata no Orochi (English version: Snake-Snake Fruit, Model: Yamata-no-Orochi) - Allows the user to become a full Yamata no Orochi or a half-Yamata no Orochi hybrid. Eaten by Kurozumi Orochi.

Sara Sara no Mi (Salamander) series

• Sara Sara no Mi, Model: Axolotl (English version: Sala-Sala Fruit, Model: Axolotl) - Allows the user to become a full axolotl or a half-axolotl hybrid. In the case of Caesar Clown's slime Smiley, it became an axolotl/slime hybrid until it's death.

Mushi Mushi no Mi (Bug) series

• Mushi Mushi no Mi, Model: Kabutomushi (English version: Bug-Bug Fruit, Model: Rhinoceros Beetle) - Allows the user to become a full rhinoceros beetle or a half-rhinoceros beetle hybrid. The user can also fly in either form. Eaten by Kabu.
• Mushi Mushi no Mi, Model: Suzumebachi (English version: Bug-Bug Fruit, Model: Hornet) - Allows the user to become a full hornet or a half-hornet hybrid. The user can also fly in either form. Eaten by Bian.

Single model series

• Mogu Mogu no Mi (English version: Diggy-Diggy Fruit/Mole-Mole Fruit) - Allows the user to become a full mole or a half-mole hybrid. The user can also dig underground. Eaten by Drophy.
• Uma Uma no Mi (English version: Horse-Horse Fruit) - Allows the user to become a full horse or a half-horse hybrid. In the case of Gan Fall's pet bird Pierre, he resembles a Pegasus.
• Kame Kame no Mi (English version: Turtle-Turtle Fruit) - Allows the user to become a full turtle or a half-turtle hybrid. In the case of Pekoms, he resembles a Tarasque

Unnamed Fruits

This section lists the Zoan Devil Fruits that haven't been identified yet.

• Minotaurus' fruit which allows him to take the form of a Holstein cow.
• Minokoala's fruit which allows him to take the form of a koala.
• Minorhinoceros' fruit which allows him to take the form of a rhinoceros.
• Minozebra's fruit which allows him to take the form of a zebra.
• Onigumo's fruit that lets him sprout spider-like arms from his back as well as grow a spider's abdomen.
• Dalmatian's fruit which allows him to turn into a dalmatian.
• Epoida's fruit which allows him to turn into a caterpillar.
• Minochihuahua's fruit which allows him to take the form of a chihuahua.
• Kaido's fruit which allows him to transform into an eastern dragon.

logia

Logia fruits​

• Moku Moku no Mi (English Versions: Smoke-Smoke Fruit/Plume-Plume Fruit): Allows the user to create, control, and transform into smoke. Eaten by Smoker.
• Suna Suna no Mi (English Versions: Sand-Sand Fruit): Allows the user to create, control, and transform into sand. The sand can dehydrate any non-metallic substance it touches. Eaten by Crocodile.
• Mera Mera no Mi (English Versions: Flame-Flame Fruit/Flare-Flare Fruit): Allows the user to create, control, and transform into fire. Eaten by Portgas D. Ace until his death and later eaten by Sabo.
• Goro Goro no Mi (English Versions: Rumble-Rumble Fruit): Allows the user to create, control, and transform into lightning. Eaten by Enel.
• Hie Hie no Mi (English Versions: Chilly-Chilly Fruit/Ice-Ice Fruit): Allows the user to create, control, and transform into ice. Eaten by Kuzan.
• Yami Yami no Mi (English Versions: Dark-Dark Fruit): Allows the user to create, control, and transform into darkness. The darkness has strong gravitational properties and the user has an infinite amount of space inside of their elemental body. Eaten by Marshall D. Teach.
• Pika Pika no Mi (English Versions: Glint-Glint Fruit): Allows the user to create, control, and transform into light. Eaten by Borsalino.
• Magu Magu no Mi (English Versions: Mag-Mag Fruit): Allows the user to create, create, and transform into magma. Eaten by Sakazuki.
• Numa Numa no Mi (English Versions: Swamp-Swamp Fruit): Allows the user to create, control, and transform into mud. The user is a "bottomless swamp", granting them an infinite amount of space inside their elemental body. The mud can take on the properties of quicksand. Eaten by Caribou.
• Gasu Gasu no Mi (English Versions: Gas-Gas Fruit): Allows the user to create, control, and transform into gas. Eaten by Caesar Clown.
• Yuki Yuki no Mi (English Versions: Snow-Snow Fruit): Allows the user to create, control, and transform into snow. Eaten by Monet until her death.

 

[Paz42]

i think the whole blackbeard thing was that he absorbs everything even the damage that is done to him hence why even though its a logia type he can still be hurt with physical damage.
i was just wondering they state that you cant eat more then one devil fruit or your body will be torn apart so what about if brooke had eaten his Yomi Yomi no mi and then eaten another one would he have been brought back to life with two seperate powers or is that just a dumb idea.

 

[big_p]

I would say it wouldn't matter because his body would have exploded so he would have no body to return to. then again, maybe he can inhabit bodies. or maybe he would just keep exploding each time if he could inhabit bodies. interesting question.

And if he could somehow pull that off then that would be awesome. and yet pointless, cause he can only die once right? so then the yomi yomi no mi is gone and he is left with just the other ability? i have no freakin clue. very interesting question

 

[Impel Down]

He wouldn't have a body to return to if his exploded, so his soul would wander around for eternity, and that would suck.

So no, I don't think you'd eat two DFs, even if one is the Yomi Yomi no mi.

 

[Dhomochevsky]

Isn't it all just rumours and heresay about eating two DFs? No one has tried eating two fruits yet, have they? It would be interesting to see what really happens when two fruits are eaten.

There is one thing that has been bothering me. Sanji said something along the lines that there is only one of each DF so how are fruits identified in the catalog?

 

[Impel Down]

I think there can only be one at one time, I believe I heard something like that.

And Blueno (or was it Lucci?) said that scientists figured out that you explode, and according to Jyabura, it's a legend that it will happen too, so some people have probably tried it.

 

[Imitorar]

Devil Fruits can be identified based on their "aura". I believe Blackbeard mentioned this in chapter 440. If you wanna be sure, you could wiki Devil Fruits, and they'll have the source for it there.

And the thing that's still just rumor is that if a Devil Fruit user gets NEAR another Devil Fruit, he'll explode. That is just a myth, but Dr. Vegapunk proved that you can't eat more then one Devil Fruit.

 

[Impel Down]

But he did also say that you explode if it happens, so yeah, it does make people explode.

 

[Dhomochevsky]

I read the wiki article and it says that your body destroys itself after eating two fruits. So maybe it's spontaneous combustion.

I also read through some of SBS (Shitsumon o Boshū Suru) here at Arlongpark.net and found Oda-sensei's response on how Devil Fruits are identified:

O: Well, I think I'll eventually get to explaining more about the Devil Fruit in the main story, but you see, there's a book of the Devil Fruit. It has info about all kinds of fruit names and abilities, but few of the fruit can actually be identified by their shape. In the case of the Gomu Gomu Fruit, there was a picture and everything, but for Kaku and Califa, they were talking about how they wouldn't know until they had finally eaten the fruit.

 

[Impel Down]

*smacks forehead* That's it! That's how they defeat Blackbeard! They force him into eating another DF! Sure, it's a risky plan, and it's hard to get DFs, but it would kill him, eventhough he's seemingly unkillable!

 

[Willreaper]

First off, eating two devil fruits will kill you because, as told in their name, each one contains a different devil (or deamon I prefer) that has its own special power and transfers it to the eater. So if you eat two different fruits the corresponding devils will fight for dominence, altimently killing the eater from the inside. They also do have ways of telling what power each devil fruit has, the marine scientist Dr. Vegapunk figured out methods of how tell before you eat the fruit. In the case of the CP9 they didn't have time to classify the fruit, so Kaku and the women just took stabs at what they would get. On a similar note, the rubber fruit that Luffy ate was classified and stolen from Dr. Vegapunk. The Dr. Vegapunk also figured out safe ways to get throught the calm belt, and how to get "items" like guns or swords to eat devil fruits, but it only seems to work with Zoan type fruits, and you end up with things like Lassoo (dog cannon) and Funkfreed (elephant sword).

 

[Impel Down]

Okay, the summaries are getting annoying. And the idea that the two devils inside you will fight and kill you was part of the myth, not the actual scientific reasoning.

 

[Dhomochevsky]

*smacks forehead* That's it! That's how they defeat Blackbeard! They force him into eating another DF! Sure, it's a risky plan, and it's hard to get DFs, but it would kill him, eventhough he's seemingly unkillable!

That's genius

I read in the SBS that the powers of the Devil Fruit are transferred after the first bite. Someone could slip a piece of DF into Blackbeard's food without him noticing and let the fireworks ensue.

 

[Impel Down]

That's the best solution to defeating BB that I can think of, aside from throwing Seastone into the black hole.

 

[Imitorar]

Yeah, because people are just rolling in Devil Fruits. They can get Devil Fruits so easily it's not worth batting an eyelash over to use a perfectly good Devil Fruit up on an assassination attempt.

...

Okay, sorry for being so snarky about that. It's a valid way of beating Blackbeard, and would probably work, but practically, it'll never happen. They just don't have Devil Fruits to spare on this sort of thing. And it would be a waste of one to use it this way anyway. Basically, it could work based on the laws of One Piece, but based on how the situation is, I don't think that it'll actually happen, despite it's being possible.

 

[Willreaper]

That, and he seems to be extremly smart so it probably wouldn't work to just try and trick him. He would see through something like that. I think the weakness to him is that he is solid unlike the other logia types. So Luffy will probably have to fight him eventually, and will try to overpower and beat him to a pulp like he does with everyone else. But first he will fail a couple of times to Teach, then find a sure way to win and just barely win.

 

[Impel Down]

He hasn't fought BB at all, really, but did challenge him once. I imagine their fight would be...epic, when they actually fight, not like a Luffy v. Croc Round I thing. Then, it would just be Luffy getting his ass kicked and Nami screaming.

 

[Absolutio]

Well.. I was just wondering lately if Luffy's devil fruit power really is 100% peremycia like. I mean, Peremycia fruits are supposed to grant the person a special ability (like Foxy's Noro Noro beam, Robin's ability to sprout her body parts from everywhere, Buggy's ability to seperate his body, etc.). Logia fruits are supposed to turn the person's body completly into an "element" (it's in " " since it's not necessarily element, but might be element-like). Example for the elemental logia fruits are Ace's fire, Enel's thunder, and even Ao Kiji's ice. Elemental-like are Crocodile's sand, and Smoker's smoke.
Thing is, Luffy's fruit doesnt really grants him an ability, but rather change his whole body into something else - rubber. Arent Logia fruits are the ones which supposes to change your body structure? (Except Zoan that grants you animal powers). Luffy's devil fruit isn't peremycia-like at all. And I know that one of the Logia fruits "trade-marks" is the fact that normal blows go through them, but then again, it seems that it isn't so for all of the Logia fruits (Ao Kiji takes the hits, but can reconstruct himself afterwards, Blackbeard takes the hits too). So maybe Luffy is not a peremycia type at all?

The only one that has a similiar "peremycia" type devil fruit I can think of is Number #1, which had an ability to make blades/steel everywhere on his body, or even having his whole body like steel. I don't remember it too good..

Moderator Notice:
Edited thread title for better comprehension.~ Luckas

 

[Imitorar]

I direct you to the SBS for volume 47. Look for the part about Califa. And apply it to Luffy. And rubber isn't really an element, so he can't be a Logia. I know that smoke and sand aren't either, but rubber just isn't that sort of material, if you know what I mean. It isn't a Logia type of element, while smoke is. And besides, Enel said it's a Paramecia. So did alot of other people. I think Oda's made it clear that the Gum Gum fruit is a Paramecia Fruit.

 

[gfire2]

wasnt it mentioned somewhere that physical attacks dont affect luffy?

 

[hatsuharupeace]

Physical attacks hurt Luffy, but not as much as it will to a normal person. I think pointy weapons like swords are the ones which affect Luffy the most. Blunt objects and weapons are ones which Luffy bounces back, a.k.a. cannonballs.