GB: Pokemon Red/Blue (specifically Red, but both were epic)
SNES: Super Metroid
GBC: Oracle of Ages/Seasons (specifically Seasons)
N64: Ocarina of Time
GC: Super Smash Bros. Melee
GBA: Secret of Mana <3
Wii: Twilight Princess (untill further notice)
BTW: Mario, Six Gold Coins, was an original GB game, not GBC.