Bosskatsu is a hamster form of Bosskatsu, Man 2, a Revolutionary creature spirit that was introduced in the Versus Revolution Final season of the Duel Masters Anime. He was one of Katta Kirifuda's creature partners along with Hamukatsu. He is also a mechanic of Team Hamukatsu, being able to produce and build new cards and creatures needed for Katta and Hamukatsu in battles.