Unlock QWERTY
Beat SSE 5 times, beat Classic Mode on all difficulties with the 35 characters, and do the same with Allstar Mode. Then go to the Name Creater Mode where you get to input your own names that you can select for your character, and type in QWERTY in all caps and press enter. Then select QWERTY as the name for your character in Brawl Mode and win a stock match with any amounts of lives. Then beat QWERTY and he's yours!
More tricks, tips and cheats for this game are right here - Super Smash Bros. Brawl cheats