Nickelodeon Party Blast (GameCube)
CheatingDome.com
Arnold, Darwin, Twister, and TJ Drum
Use Zim in Pickles House.
Extra Hoop
In the Jimmy Neutron basketball stage there is a window on the top left corner of the stage if you have a ball it will open, it gives 350 points.
Extra Characters unlocked
Go into blast mode and enter the code on the D-Pad. Down, Down, Right, Left, Right, Up, Left, Down, Right.
Helga, Anne Geronimo, and Patrick Star
Use SpongeBob in Downhill Madtown.
Manuel Diaz, Angel Menzada, and Jessica Rodriguez
Use Tommy in Krusty Krab.
Unlock Bungi games
Highlight the Bungi game at the bottom of the game selection screen, then press Up(2), Down(2), Left, Right.