how would i use these codes on mario kart 64, on a emulator or what, (for the wii)
Turbo Mode P1
030687D0 000045FF
Infinite Balloons P1
030FF680 00000002
Infinite Balloons P2
030FF682 00000002
Infinite Balloons P3
030FF684 00000002
Infinite Balloons P4
030FF686 00000002
Like in wii64? I don't think you can, as wii64 doesn't have a codehandler, and the addresses would most likely be different, again because it's emulating the game, and the wii's emulator is different from wii64.
no im talking about ON the wii in general, like from a homebrew app
You need to have IOS36 patched, and you can run Mario Kart 64 (and other channels) through Gecko.
From there, you can apply codes to VC games.