Mouser Mecha-Catbot was one of the four lightweights chosen to be used as a playable robot in the Gameboy Advance game BattleBots: Beyond the BattleBox (and its "sequel" BattleBots: Design and Destroy). It is based off of the Season 2.0 version of Mouser Mecha-Catbot due to the paint job. It uses both its flipper and its rear tail to attack, but due to sprite limitations the saw is barely visible. It is one of the more versatile robots due to its front and rear weapons, and can be a pain to defeat if you do not have an invertible robot. In Tournament Mode, Mouser Mecha-Catbot is your second opponent in the Lightweight division. Due to space constraints, Mouser Mecha-Catbot's name is shortened to just Mouser.
When using Mouser and facing Toe Crusher, instead of flipping once, activate its weapon over and over in rapid succession to have a better chance of defeating the opponent as it'll do more damage and score more points.