3 copies of 2 Zelda games, if you count Wii Virtual Console.

The Ocarina of Time
N64
GameCube (+Master Quest, from Wind Waker pre-order)
Wii Virtual Console (Not entirely sure why my brothers decided to buy and download it, since Wii can play GameCube games...)

A Link to the Past
SNES (I no longer have an SNES, so it's probably in a box in the attic if I still have it)
Gameboy Advance (It keeps vanishing and reappearing, but I know it's still around here somewhere...)
Wii Virtual Console