Mario Kart Wii Gecko Codes, Cheats, & Hacks

Can i request a codes for MKwii? 
-I want can change characters between races in vs mode offline .
-triple blue Shell over blue shell.
-thunder and pow only damage one player like red Shell
-you can shot thunder cloud  like the green Shell .

The Offline; Item section is for releasing codes, I've moved your post to the requests section