Eliminate Down

On the title screen, press A, B, Right, Left, Right, Left, Down, Down, Up, Up on Controller 1. You should hear a confirmation sound. After starting the game, press Button A on Controller 2 to cycle through different weapon types and Button B on Controller 2 to cycle through the powerup levels.

Press A, B, Right, Left, Right, Left, Down(2), Up(2) at the title screen. A sound will confirm correct code entry. Begin game play, then press A on controller two to cycle through the different weapon types or B on controller two to cycle through power-up levels.