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Super Smash Bros. Melee hacks
by Robbie, filed in $20 Game Of The Week, Games on Aug.22, 2005
N-Philes has a great feature about game Hacks that have been found for SSBM. The most interesting is you can play with any character(The Hand and Sandbag) in the game. Over 60 boards to fight on and 6 player action. Of course you can only use 4 controllers but you can do 4 humans vs. 2 computers.
The codes(they require action replay) can be found here for version 1.0 of the game they also have 1.1 and 1.2 available.
They also have an interesting feature on Animal Crossing.