I don't even know. I would probably say a tie Between Zelda Twilight Princess, (Even though i think WW is a better game i just really love twilight princess,) Earthbound, (GO PLAY IT,) and Pokemon Black and White.
My favorite would either be Pikmin 1 (although I dont hate the other pikmin games) or LoZ SS, I can't tell you how many times I played those when I was younger. There was a point where I'd beat Pikmin and start a new game immediately.
