Want to know why there hasn't been any games since JJGBA? Because Epic sent him to Halloweentown to be used for testing! Where um, he died.

I know the only logical way to say it's jazz is that he's in JJGBA costumea(which somehow evolved into a sweater), and his hair grew and his ears shrunk.
EDIT-Dang after posting this the middle skeleton doesn't look like a rabbit at all