- When Mousse damages a player in battle, it also steals stars equal to their level from them.
Mousse appeared in Bounty Hunt Mode during the Bounty Hunters event as a monster that could be fought in Bounty Battles. Mousse granted 2 fame upon KO.
Mousse also appears as an opposing enemy unit in Wanderers Final Episode. It has the same stats and passive as in Bounty Hunt Mode, as well as a REC of 4, and does not possess a Hyper.