Was going to say Suikoden II, but someone else already beat me to it. That's my #1 Favorite game. So I guess I'll have to go with one of my #2's (yeah I've got a few) -- So... umm....
Final Fantasy III (or VI depending on how you count)
Edit: that's HILARIOUS!!! No joke, I was just thinking about other non-RPG games and I said, y'know I should go back and switch it to Super Metroid since everyone else is guessing RPGs/Zelda games. So I just came back to edit my post and saw the one that somehow got posted while I originally posted mine... Congrats to the person who thought a few moments faster than me!
Edit: #2 And yes, I agree -- Super Metroid is in my Top 10 all-time games and top 5 SNES games of all time (its FF3, ChronoTrigger, Super Metroid, Secret of Mana, and SuperMario RPG/Earthbound for #5)