Can someone help me?
Do you mean how do you apply codes in Riivolution?
Yes
Place the .GCT in directly in the folder of the name of the mod your using.
brawlmods/(name of mod)/(gct file)
Thats all!! :D
Thanks :)
Note, that also means you can have multiple .GCT's, so you can have B+ and Project M on the same SD. ;)
Ok :)