The Inu Inu no Mi, Model: Cerberus (イヌイヌの実 モデル:サーベラス Inu Inu no Mi, Moderu: Saaberasu) is an exceptionally rare and immensely powerful Mythical Zoan type
Cerberus Theory - Blackbeard Had Already Eaten a Devil Fruit
Specifically, a Mythical Zoan Fruit possibly called the Inu Inu no Mi, Model Cerberus. Theorists believe that due to the nature of the actual mythical Cerberus having three heads with independent thought, this allows Teach to use more than one Devil Fruit.
The Inu Inu no Mi, Model: Cerberus is a Mythical Zoan Devil Fruit that allows its user to transform into a three headed dog hybrid and a full Cerberus at will, making the user a Cerberus Human (ケルベロスヒューマン ). It was eaten by Colton D Soren.
The Tako Tako no Mi, Model: Kraken (, Tako Tako no Mi, Model: Kraken?) is a Mythical Zoan type Devil Fruit that allows it's user to turn into a kraken hybrid or a full kraken at will. It was eaten by Konung, turning him into a Kraken Fishman (クラーケン 魚人, Kurāken Gyojin?).
The Inu Inu no Mi, Model: Dachshund is a Zoan-type Devil Fruit that allows its user to transform into a dachshund hybrid and a full dachshund at will. It was "eaten" by Mr. 4's bazooka, Lassoo, through the process developed by Vegapunk.
Logia. The rarest and most powerful of the three Devil Fruit types, Logia-type Devil Fruits allow their users to create, control, and transform their body into a natural element, such as smoke, sand, fire, lightning, ice, light, magma, mud, snow, plants and even darkness.
6) and Episode 359, Sanji describes Absalom as an Invisible Man who ate the Suke Suke no Mi.
The Tsuki Tsuki no Mi is a Logia-type Devil Fruit that allows the user to transform into moonlight and even use properties of the Moon itself. They're even able to use enough light to block out the sun making it temporary nighttime during the day making the user a Moon Human.
The Inu Inu no Mi, Model: Wolf is a Zoan-type Devil Fruit that allows its user to transform into a wolf hybrid (which almost resembles a werewolf) and a full wolf at will, making the user a Wolf Human (狼人間, Ōkami Ningen?). It was eaten by Jabra.
Trivia. Blyue is the first giant known to have consumed a Devil Fruit in the franchise, but is not the first canon giant Devil Fruit-user.
The Ryu Ryu no Mi, Model: Allosaurus is an Ancient Zoan-type Devil Fruit that allows the user to transform into an allosaurus hybrid and a full allosaurus at will. It was eaten by X Drake.
Hito Hito no Mi (English versions: Human-Human Fruit) - Allows an animal that eats it to become a full human or a half-human hybrid, as well as grant them human-like intelligence and the ability to speak.
Kaze Kaze no Mi (風風の実) is a Logia-Type Devil Fruit that turns the user's body into wind and allows the user to control and generate wind or high pressure currents with their body.
SMILEs are the artificial Zoan Devil Fruits that were created by Caesar Clown. They are produced by irrigating natural fruits with a special substance known as SAD.
This is the only devil fruit Luffy has consumed in One Piece. It is important to remember that characters in One Piece can only consume one devil fruit. If they attempted to consume another one, their body would be torn apart to an extent that almost no traces would be left. This would ultimately result in their death.
Also, a person can only have one devil fruit powers. The concept is that once a devil's spirit is already within a person, it will not welcome another devil spirit. There would be an internal conflict so to speak and the person who consumed two devil fruits would inevitably die.
The Inu Inu no Mi, Model: Kyubi no Kitsune is a Mythical Zoan-type Devil Fruit that allows the user to transform into a nine-tailed fox.
Yamato ate a Mythical Zoan Class Devil Fruit known as the Inu Inu no Mi, Model: Okuchi no Makami, which allows her to willingly transform into a hybrid or full form of the wolf deity described as being the Guardian Deity of Wano.
Uddo Uddo no Mi (木木の実, Japanese for "Wood-Wood Fruit") is a logia-type devil fruit that allows the user to create, control and transform into wood at will, turning the user into a Wood Human (木仁, "Ki Jin" in Japanese).
The Danu Danu no Mi, Model: Surya (ダヌダヌないミ、モデル) is an Mythical Zoan type of Devil Fruit, in which the user is able to transform into a hybrid or full version and gain the powers of the Sun god, Surya. Surya meaning “Sun God”, in both Viz Manga, and the FUNimation dub called the Child-Child Fruit, Model: Sun God.
Niji Niji no Mi (Rainbow Rainbow Fruit) is a Logia-type Devil Fruit which bestows upon its consumer the ability to materialize, manipulate, and or metamorphose into Nijiiro (Rainbow Color Particles). It was eaten by Felix Blackburne.
Pell (Bird Bird Fruit, Model: Hawk) Marco (Mythical Zoan, Model: Phoenix) Shiki (Float Floast Fruit) Kaido (Mythical Zoan, Model: Dragon)
Mihawk's strength is so great that Don Krieg accuses him of having the power of a Devil Fruit. While it has not yet been officially confirmed that he does not, it has only been indicated that his abilities are from pure skill and power.
Like normal Devil Fruits, SMILEs render those who consume them unable to swim. It has been noted that, unlike real Devil Fruits, SMILE Fruits actually taste good.
The Mera Mera no Mi is a Logia-type Devil Fruit that allows the user to create, control, and transform into fire at will. It was eaten by Sabo, and previously by Portgas D. Ace.