Bust-A-Move 2: Arcade Edition on the Saturn. The faces in those bubbles. What is...? I don't even...
As for best-for-worst, maybe Deadly Towers on the NES. The cover art is reminiscent of standard fantasy art, but it is in NO WAY indicative of the actual game. Your character looks nothing like the one on the cover, even taking the NES' limited hardware into account.