The other Mutant I can find is Razor Claw. A raptor/wolverine hybrid…allegedly but I’ll get to that in the review, Razor Claw is described as loyal and self-sacrificing, really enjoys fighting Predacons, but only tolerates the Maximals for their helpfulness. Also he secretly wishes he could take on a robot mode, which makes me question the whole “total organic” viewpoint the Mutants had, a tie-in to the backstory of Beast Machines, the main line at the time.
For those of you who missed the previous review, Mutant Beast Wars used leftover Animorphs figures with the gimmick of switching between two beast modes. I don’t know a lot about the lore of the books or the live-action TV show adapting it, which is where the line comes from. I do know that it’s about a group of kids given the ability to turn into any animal they touch, which they use to help a friendly alien halt an invasion by the Yeerks, slug-like aliens who take over other people Invasion Of The Body Snatchers style. There were aliens in the Animorphs toyline, and one of Razor Claw’s modes looks like it was designed with aliens in mind.