I want an Assist Trophy. Well, at least, I really, really like this idea I got while playing SMB.....
Cheep-cheeps. Or flying fish. Get the trophy, and 8-bit cheep-cheeps come flying up the screen, just like in SMB. They'd sorta home-in on the person who is in the lead. If the guy in the lead gets it, then whoever's in 2nd place the fish will have a tendancy to follow a bit.
I never really had any trouble with those levels in SMB; but I do know many complain that they're hard.
Cheep-Cheep AT for Brawl.