Found another undocumented character!
Also, Tokka is a COMPLETE PAIN to fight in this game. Every time they have him as a Boss, it's like I briefly hit a brick wall in my progress. Not only does his body slam attack REALLY hurt, but his spiky shell skill does damage to YOU every time you damage HIM. (Even if it's something like Rocksteady's blaster, however much sense THAT makes.) Oftentimes it just comes down to my best guy having a war of attrition with him at the end of a stage and me abusing a glitch that leaves him frozen permanently. (Despite that, though, the spiky shell STILL damages you.)