Mario Party 2 (N64)

Beat the system
At the beginning of a game, set all computer players to Hard, with a 50-coin handicap for everyone in Mini-Game Stadium. As the first player is hitting the dice block, pause the game, and set your character to Com Hard, and unpause. You will get every coin the computers accumulate! (Stars count for 50 coins.)

Sent in by: Dave Adams

Just dance
In the "Move to the Music" minigame, if the leader does nothing for a beat, the followers have to do something for that beat to keep from failing the round.