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For the Color Walk, see One Piece Color Walk 7 Tyrannosaurus.

Tyrannosaurus is the name of a small mouse that Iceburg found and takes care of.[2]


Tyrannosaurus is a small, white mouse, with a long hairless tail, red eyes, and a cheerful look on its face.[1]

Most of the time it stands on his rear legs, keeping its front legs raised in a standard mouse pose somewhat resembling a Tyrannosaurus Rex, which probably gave it the name.

After the two-year timeskip, it wore a miniature pinstriped suit jacket over a dark-colored shirt and light-colored tie.[4]


Iceburg Color Scheme
Tyrannosaurus's color scheme in the manga.
Iceburg Digitally Colored Manga
Tyrannosaurus in the Digitally Colored Manga.
Iceburg Anime Concept Art
Tyrannosaurus in Iceburg's concept art from the anime.
Iceburg Boss Luffy Historical Special
Tyrannosaurus with Iceburg in "Boss Luffy Historical Special".
Iceburg Sprite
Tyrannosaurus as seen in Iceburg's portrait in One Piece: Gigant Battle!.
Iceburg One Piece Odyssey
Tyrannosaurus with Iceburg in One Piece Odyssey.


Tyrannosaurus spends most of its time lying in Iceburg's breast pocket and squeaking happily when Iceburg caresses him.[2]

It is apparently very loyal and attached to Iceburg, as it is always seen with him. During the fire at Galley-La Company's headquarters, instead of running away, it remained by its master's side, trying to wake him up with squeaks in order to save him.


Water 7 Saga[]

Water 7 Arc[]

Tyrannosaurus is always seen together with Iceburg; it appeared the first time in his pocket, when Mikazuki was bothering Paulie at Dock 1, before being defeated by him and the other carpenters along with his crew.

When Iceburg met the Straw Hat Pirates, he said that he had recently picked up this mouse and then gave it the name Tyrannosaurus. He requested Kalifa to get Tyrannosaurus some rodent food and a cage, which she had already done for him.

During Iceburg's convalescence, it was always by his side, standing on his bed.

Later, during the fire at the company's headquarters at the hands of the CP9, instead of running away, it tried to wake up Iceburg, without success. It, alongside his master and Paulie, were fortunately saved by Tony Tony Chopper.

Thriller Bark Saga[]

Where Are They Now[]

While Iceburg was auditioning new secretaries, Tyrannosaurus sat in Iceburg's pocket as usual.[5]

Fish-Man Island Saga[]

From the Decks of the World[]

Two years later it is still with Iceburg and his new secretary, Alice.[4]

Whole Cake Island Saga[]

From the Decks of the World: The 500,000,000 Man Arc[]

When Franky's new wanted poster reached Water 7, Tyrannosaurus was inside Iceburg's pocket while he and his acquaintances looked at the poster.[6]

Final Saga[]

Egghead Arc[]

When Vegapunk began broadcasting a world-wide transmission, Tyrannosaurus rode on Alice's head as she made preparations for showing the transmission around Water 7.[7]


  • Tyrannosaurus was picked up by Iceburg not long before the meeting with Luffy. Iceburg also gave it the name during that occasion.[8]
  • Tyrannosaurus' favorite food is spinach.[9]


  1. 1.0 1.1 One Piece Manga and Anime — Vol. 34 Chapter 323 (p. 15) and Episode 230, Tyrannosaurus makes his debut.
  2. 2.0 2.1 2.2 2.3 One Piece Manga and Anime — Vol. 34 Chapter 326 (p. 8) and Episode 231, Iceburg introduces Tyrannosaurus to Luffy, Usopp and Nami.
  3. One Piece Blue Deep: Characters World (p. 107), Tyrannosaurus's birthday is revealed.
  4. 4.0 4.1 One Piece Manga — Vol. 66 Chapter 655, cover story: From the Decks of the World Vol. 37.
  5. One Piece Manga — Vol. 50 Chapter 487, cover story: Where They Are Now Vol. 2.
  6. One Piece Manga — Vol. 81 Chapter 816, cover story: From the Decks of the World: The 500,000,000 Man Arc Vol. 10.
  7. One Piece Manga — Vol. 109 Chapter 1109 (p. 6).
  8. One Piece Manga and Anime — Vol. 34 Chapter 326 and Episode 231, Iceburg introduces a little mouse he recently picked up to Luffy, and names the mouse Tyrannosaurus.
  9. Vivre Card - One Piece Visual Dictionary (Card #0374), Tyrannosaurus' favorite food is revealed.

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