Restore the game and enter Up,T, X, R, Up, T, O, D, R, D as a password. When the game starts both players can capture flags simultaneously.
Capture the Flags
Restore game and enter Down, T, R, X, R, Up, R, O, X, D as a password. Now all flags must be captured to complete a level.
Mega Build Code
Press X three times and then hold X. Roll onto S and then roll off S.
Racing Game
Restore the game and enter X, T, R, S, R, Up, D, T, R, D as a password. Select 2 player mode and choose Grid Racer world 1, 2, or 3. A two car race will start and each lap counts as a flag with spells still working. Complete 10 laps and win the race.
View Ending
Restore the game and enter X, T, X, Right,Down, T, Up, Right, Right, X as a password.