I haven't tried it on the Wii. I actually never got around to buying a game system in the last 20 years, since NES. I still play NES once in a while on the computer through an emulator. Games like Contra, Legend of Zelda, all the Mario games.
you know an old school DOOM player when you find someone who can type the codes with one hand in the blink of an eye while simultaneously trying to kill demons with the other hand.
I remember the old nintendo cheat codes as well. I also vaguely remember writing down "save codes" to save your place in certain games. They were long strings that you had to write down 100% correct or you would lose your progress forever!