Load up a Special Brawl. Choose the options "Stamina" (matches are based off of HP) and "Flower" (characters will have a health-draining Flower on their heads at all times). Play against a single CPU character and set their HP to 1, leaving your HP anything higher than 1. When a fight starts, your opponent will automatically die from the flower (this is a self-destruct) and the match will end. This method is very useful for unlocking anything that requires "Brawl on 10 times" or "Brawl with 20 times," etc. It can also be used to inflate the amount of Brawls played, possibly unlocking characters and Assist Trophies. The only thing it cannot unlock is anything requiring "standard Brawl victories", as it is a Special Brawl and not standard.