Level select
Hold Select and press A(4), B(4), A, B, A, B, A, B, A, B on the player selection screen. A sound will confirm correct code entry. Select a character and begin game play.
Stage Select
Hold Down + Select and press A, B, A, B, A, B, A, B on the player selection screen to jump to one of the four stages in the game. Repeat the code to jump to the end Boss.