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Ushi Ushi no Mi, Model: Bison

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This is the "Bison" model of this fruit. For the "Giraffe" model, see Ushi Ushi no Mi, Model: Giraffe.

The Ushi Ushi no Mi, Model: Bison[2] is a Zoan-type Devil Fruit that allows its user to transform into a bison hybrid and a full bison at will. It was eaten by Dalton.


  • "Ushi" is Japanese for "cow" or "ox", and bison are part of the same subfamily as cows.
  • While the kanji is written as 野牛 (yagyū? Japanese for "bison"), the pronunciation remains as baison, the Japanese way to pronounce the species' name.
  • In the 4Kids dub, this fruit is simply called the Ox-Ox Fruit.
  • In the Viz Manga, this fruit is called the Ox-Ox Fruit, Bison Model.
  • In the FUNimation dub, this fruit is called the Ox-Ox Fruit, Bison Form.

Strengths and WeaknessesEdit

UshiUshi Bison full bison

Dalton in his full bison form.

The major strength this fruit grants, as demonstrated by Dalton, is that the user is granted two extra forms to transform into: a full bison form and a human-bison hybrid. This gives him enhanced physical capabilities, similar to a real bison's or even more. Using this as an advantage, Dalton possesses incredible strength and speed, to the point of creating afterimages.[2]

This fruit has no known weaknesses, aside from the standard Devil Fruit weaknesses.


This fruit's added physical capabilities allowed the user to become much more deadly when fighting. Dalton has used the fruit's powers primarily for combat purposes. While it does provide increased strength, Dalton's usage of the powers are more oriented to the increased speed, dodging bullets and creating afterimages to swiftly strike down multiple targets.

Fiddle Banff

Dalton using Fiddle Banff on Wapol's soldiers.

  • Fiddle Banff (フィドル突撃 (バンフ) Fidoru Banfu?, literally meaning "Fiddle Assault"): Dalton transforms into his bison-human hybrid form and then charges at his opponent with incredible speed, slashing them with his peculiarly-shaped spade. He can take out multiple opponents with this technique.[2] The name Banff refers to the Banff National Park, the oldest nation park in Canada containing the Canadian portion of the Rocky Mountains. In the Viz Manga and FUNimation dub, this is called Fiddle Bam. This was first used on some of Wapol's soldiers.

Translation and Dub IssuesEdit

In the 4Kids dub of the anime, the fruit's name was changed to Ox-Ox Fruit in order to cater to an English-speaking audience. While this is technically correct, due to the lack of any words suggesting otherwise, the name in the 4Kids dub technically implies that Dalton turns into an ox instead of a bison. While the words "ox" and "bison" can sometimes be interchangeable, they usually refer to two different breeds of bovine. The Viz Manga and FUNimation dub avoid confusion by calling it the Ox-Ox Fruit, Bison Model and Ox-Ox Fruit, Bison Form, respectively.


  • This Devil Fruit's ability was never seen or mentioned during the Episode of Chopper Plus film.
  • This is the first Zoan to appear in the series.


  1. One Piece Manga and Anime — Vol. 15 Chapter 135 (p. 19) and Episode 81, Dalton transforms into a human-bison hybrid.
  2. 2.0 2.1 2.2 One Piece Manga and Anime — Vol. 15 Chapter 136 (p. 13-14) and Episode 82, The devil fruit's name is revealed by both one of Dalton's former soldier and one of the citizens of Bighorn.

External Links Edit

  • Bison - Wikipedia article about bisons in general.
  • Ox - Wikipedia information about oxen.

Site NavigationEdit

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Devil Fruit Based: Baku Baku no Mi  •  Ushi Ushi no Mi, Model: Bison  •  Hito Hito no Mi  •  Noko Noko no Mi
Related Articles
Locations: Drum Castle  •  Bighorn  •  Cocoa Weed  •  Gyasta  •  Robelle  •  Drum Rockies
Misc: Sakura Kingdom  •  Drum Ropeway
Story Arc(s): Drum Island Arc  •  Post-Enies Lobby Arc  •  Post-War Arc  •  Totto Land Arc
Movies: Episode of Chopper Plus: Bloom in Winter, Miracle Sakura
[v · e · ?]
Devil Fruits
Canon: Gomu Gomu no Mi  •  Bara Bara no Mi  •  Sube Sube no Mi  •  Kilo Kilo no Mi  •  Bomu Bomu no Mi  •  Hana Hana no Mi  •  Doru Doru no Mi  •  Baku Baku no Mi  •  Mane Mane no Mi  •  Toge Toge no Mi  •  Supa Supa no Mi  •  Ori Ori no Mi  •  Bane Bane no Mi  •  Ito Ito no Mi  •  Noro Noro no Mi  •  Doa Doa no Mi  •  Awa Awa no Mi  •  Beri Beri no Mi  •  Sabi Sabi no Mi  •  Shari Shari no Mi  •  Yomi Yomi no Mi  •  Kage Kage no Mi  •  Horo Horo no Mi  •  Suke Suke no Mi  •  Nikyu Nikyu no Mi  •  Ope Ope no Mi  •  Shiro Shiro no Mi  •  Mero Mero no Mi  •  Doku Doku no Mi  •  Horu Horu no Mi  •  Choki Choki no Mi  •  Gura Gura no Mi  •  Woshu Woshu no Mi  •  Fuwa Fuwa no Mi  •  Mato Mato no Mi  •  Buki Buki no Mi  •  Guru Guru no Mi  •  Beta Beta no Mi  •  Hobi Hobi no Mi  •  Bari Bari no Mi  •  Nui Nui no Mi  •  Giro Giro no Mi  •  Ato Ato no Mi  •  Jake Jake no Mi  •  Pamu Pamu no Mi  •  Sui Sui no Mi  •  Ton Ton no Mi  •  Hira Hira no Mi  •  Ishi Ishi no Mi  •  Nagi Nagi no Mi  •  Chiyu Chiyu no Mi  •  Soru Soru no Mi  •  Mira Mira no Mi  •  Pero Pero no Mi  •  Bisu Bisu no Mi
Non-Canon: Goe Goe no Mi  •  Hiso Hiso no Mi  •  Kama Kama no Mi  •  Kachi Kachi no Mi  •  Nemu Nemu no Mi  •  Mini Mini no Mi  •  Atsu Atsu no Mi  •  Noko Noko no Mi  •  Ami Ami no Mi  •  Kopi Kopi no Mi  •  Modo Modo no Mi  •  Mosa Mosa no Mi  •  Peto Peto no Mi  •  Moa Moa no Mi  •  Kyubu Kyubu no Mi  •  Nito Nito no Mi  •  Hore Hore no Mi  •  Gutsu Gutsu no Mi  •  Nuke Nuke no Mi  •  Koro Koro no Mi  •  Jara Jara no Mi  •  Iro Iro no Mi  •  Goru Goru no Mi  •  Raki Raki no Mi
SBS: Samu Samu no Mi  •  Gero Gero no Mi
Canon: Ushi Ushi no Mi, Model: Bison  •  Hito Hito no Mi  •  Tori Tori no Mi, Model: Falcon  •  Inu Inu no Mi, Model: Dachshund  •  Mogu Mogu no Mi  •  Inu Inu no Mi, Model: Jackal  •  Uma Uma no Mi  •  Neko Neko no Mi, Model: Leopard  •  Zou Zou no Mi  •  Inu Inu no Mi, Model: Wolf  •  Ushi Ushi no Mi, Model: Giraffe  •  Hebi Hebi no Mi, Model: Anaconda  •  Hebi Hebi no Mi, Model: King Cobra  •  Hito Hito no Mi, Model: Daibutsu  •  Kame Kame no Mi  •  Sara Sara no Mi, Model: Axolotl  •  Mushi Mushi no Mi, Model: Kabutomushi  •  Mushi Mushi no Mi, Model: Suzumebachi  •  Zou Zou no Mi, Model: Mammoth
Non-Canon: Tori Tori no Mi, Model: Eagle  •  Inu Inu no Mi, Model: Bake-danuki  •  Batto Batto no Mi, Model: Vampire
Related: Rumble Ball  •  Artificial Devil Fruit  •  SMILE
Canon: Moku Moku no Mi  •  Mera Mera no Mi  •  Suna Suna no Mi  •  Goro Goro no Mi  •  Hie Hie no Mi  •  Yami Yami no Mi  •  Pika Pika no Mi  •  Magu Magu no Mi  •  Numa Numa no Mi  •  Gasu Gasu no Mi  •  Yuki Yuki no Mi
Non-Canon: Toro Toro no Mi  •  Pasa Pasa no Mi  •  Ame Ame no Mi
Undetermined Class
Non-Canon: Zuma Zuma no Mi

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