Here are some cheats and tips for the game Teenage Mutant Ninja Turtles 2: The Arcade Game.
Level select:
Press Down(5), Right(7), B, A,
Start at the title screen before the demonstration begins.
Level select, ten lives:
Press B, A, B, A, Up, Down,
B, A, Left, Right, B, A,
Start at the title screen before the demonstration begins.
Ten lives:
Press Up, Right(2), Down(3), Left(4),
B, A, Start at the title screen before the
demonstration begins. For ten lives in a two player game, press
B, A, Up, Down, B, A,
Left, Right, B, A, Start at
the title screen.
Full energy:
Pause game play and press Up, Down, Left,
Right, A, B.
Two player mode:
Press Select + Start at the title screen.