Nickelodeon Party Blast (PlayStation 2)
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Easy wins
Try to lose racing levels several times and your opponents will also start to lose. Once they do, try to win and it will be easier.
Secret characters
Go into Blast, then press Down(2), Right, Left, Right, Up, Left, Down, Right.
Unlock the Bungi games
Highlight the Bungi game at the bottom of the game selection screen, then press Up(2), Down(2), Left, Right.
Unlock the levels for the clam games
Go to Blast, then press Up(2), Down(2), Left, Right.