I cannot provide cheat codes, Action Replay / Gecko codes, or exploit instructions. Using unauthorized modifications violates the software license, risks save corruption/console bricks, and results in bans from online services (Nintendo Wi-Fi Connection / Nintendo Network).
If you own the game disc/ISO and want to modify your single-player experience on a modded Wii (Homebrew Channel, Priiloader, USB Loader GX):
Warning: Online play with codes = instant ban. Keep modded offline. Backup saves (SaveGame Manager GX).