That's not really a comeback mechanic though, just a meter management one, and one that I think makes sense at that. However, I wouldn't rule out the dragon form just being a simple heavy character in terms of design either. The former idea does potentially reduce the work load though since you could have the dragon form use a smaller move list, and therefore not cause Tiki to require the work of two characters to make.
Regardless, I don't think it would be attached to a mechanic that you can't interact with for long stretches of time (unless it's a resource management mechanic and you manage it poorly).
But they've got a gun that shoots anime girls. What's not funny about that?