Seriously, what is the issue here? Why is Season 3 suddenly going downhill because guest characters are gonna be in it?
Personally, I don’t mind guest characters. I actually welcome guest characters as long as they’re represented well. In Rash’s case, I think he’s represented to perfection. This is coming from someone who never played Battletoads if that means anything.
As for the “Rash doesn’t fit KI” argument, of course he doesn’t. He’s not a KI character. To me, his gameplay representation is done so well that I don’t even care about that. As long as he doesn’t mess with the actual lore, I could care less what he does. And judging by the kind of character he is, if he did have a story, it’d most likely be treated as a joke anyway.