I recently got to using riivolution for brawl, Delphino Plaza was working fine, and then after using it for awhile, it just freezes the game. I tried deleting the stage that was over it, removing the music and codes, but it still freezes. It's the only stage that does this.
It may be your sd card. Have you tried backing everything up and formatting?
Also you don't have a .rel over the stage in the module folder do you?
Yeah, I tried that, and there was no .rel file, it might be my disk/wii acting up because it was also freezing without hacks.
I hate to say it, but your save file may be screwed up. Back up your save file and erase it from the Wii then try it out.