How Do You Make Hacking Codes for Wii Games?

Hey all you. I'm wondering how I can make codes for wii games. These codes are codes used to hack the games just for funs purpose. But anyway, I would like to know how do make codes for Call of Duty Modern Warfare Reflex for the wii. I do not use codes in public matches. I only use them for private matches when facing friends. Anyway please let me know if you can help me learn.

Suggestion:

you do not make them, you need to find a game glitch while playing. I will name you a few but I think it;s really annoying when people use them, well 97 percent of the people playing online hate them.