Code Effect

On the title screen, press Right, Left, Down, Up, A, B, then Start 10 Lives (Player 1)

On the title screen, press Right, Left, Down, Up, A, B, Select, then Start 10 Lives (Player 2)

On the Title Screen, hold down A+B then Press Start. Access Sound Test

At the title screen, after you've beaten the game, press , A, and then start. Retain Old Score and # of Lives on New Game

At the title screen, after you've beaten the game, press A, B, then start. Retain Old Score on New Game