Mega Cat Project

Mega Cat Project is a cat-centric figure series produced by Megahouse. To appeal to cat lovers and anime fans, this series turns popular anime characters into cats. The sets based on One Piece are titled One Piece Nyan Piece Nyan! (ワンピース ニャンピースニャーン！) Each figure is about 30 mm tall, and they are either sold for ¥715 each or ¥5,720 for a box set.

Vol. 1: I Will be the Pirate King Nyan!
The first volume, I Will be the Pirate King Nyan! (海賊王におれはなるニャン！), was announced June 2, 2021 and released in late November 2021. The set includes:
 * Monkey D. Luffy
 * Roronoa Zoro
 * Sanji
 * Tony Tony Chopper
 * Trafalgar D. Water Law
 * Shanks
 * Sabo
 * Portgas D. Ace

Vol. 2: Luffy and Rivals
The second volume, Luffy and Rivals (ルフィと好敵手編), was announced June 1, 2022 and released in November 2022. The set includes:
 * Eustass Kid
 * Donquixote Doflamingo
 * Luffy (Dressrosa)
 * Charlotte Katakuri
 * Rob Lucci
 * Crocodile (Anime design)
 * Enel
 * Smoker

Vol. 3: Luffy and the Seven Warlords of the Sea
The third volume, Luffy and the Seven Warlords of the Sea (ルフィと王下七武海), was announced October 4, 2023 and will be released in March 2024. The set includes:
 * Luffy
 * Boa Hancock
 * Dracule Mihawk
 * Bartholomew Kuma
 * Gecko Moria
 * Jinbe
 * Donquixote Doflamingo
 * Crocodile (Manga design)