How do Wii codes work?

[jani]

I amm lost,I have not got a clue how Wii codes work can you help me out
1)Do you use the codes on the game or the console?
2)how do you add them?
3)Why cant we use gamer tags like 360?

[Cluster]

do you mean the gift card codes or cheat codes?

[gushy0202]

coding??? how can you understand those machine codes??
what language is the code for Wii written?? any idea?

[Cluster]

im thinking he means redemption codes which you enter in the menu