Super Smash Bros. Brawl is one of the most hacked game released so far on the Wii with gamers creatively changing the appearance of the various playable characters to represent others not in the game. Going a step further, a team of hackers have recently discovered a way to customize a characters moveset allowing you to totally create your own original moves.
As seen in the video below, people have tested their efforts on a "Phoenix Mario" character who has completely original moves all revolving around fire. One this is tested a little more and becomes open to the public, we can expect some truly interesting clips to arise.
Source: Aussie Nintendo