John, I don't think the "mutually co-dependent" loser thing fits Bugs. It fits Elmer, all right. He definitely needs Bugs, as is evidenced by his tearful reactions upon being confronted with the possibility that he has killed the "wabbit". But does Bugs need Elmer? I think not. He unquestionably enjoys having Elmer around, and enjoys baiting him, etc, but I don't think he needs Elmer. On the contrary, Bugs always gives the impression of self-sufficient confidence and absolute emotional ease as he cruises merrily through life finding fun and pleasure where he may. If Elmer's not around, Bugs easily finds other ways to amuse himself. I don't think he's co-dependent on Elmer at all. I do think Elmer is very co-dependent on Bugs, and this is clear from Elmer's emotional reactions.

Bugs is a character who would flourish in any situation, regardless of who else was around. Elmer is a character who is almost constantly under stress.

What you say about the Three Stooges, however, I think that is totally accurate. Three losers, totally dependent on each other for mutual reinforcement. That can make for a pretty funny show.