Enter these codes at the start of the stage
Activate 3Way in Stage 05 Player 1: hold A, Player 2: hold Up
Activate 3Way in Stage 08 Player 1 should hold left + A + B and Player 2 A + B.
Activate 3Way in Stage 12 Player 1: Hold Right, A, B. Player 2: Hold A and Right/Up
Activate Auto in Stage 06 Player 1: Hold Left. Player 2: Hold Right + B
Activate Auto in Stage 11 Player 1: Hold Up/Left. Player 2: Hold Right + A
Activate Auto in Stage 13 Player 1 should hold Up and Player 2 Down.
Activate Auto in Stage 16 Player 1 should hold right + A and Player 2 left.
Activate Laser in Stage 03 Player 1: Hold the Upright + A + B button. Player 2: hold Down + B
Activate Laser in Stage 09 Player 1 should hold downright + A + B and Player 2 rightdown + A + B.
Activate Laser in Stage 14 Player 1 should hold Upleft + A + B and Player 2 Right + A + B.
Activate Shell in Stage 07 Player 1: Hold Up/Left. Player 2: Hold Down
Activate Shell in Stage 10 Player 1 should hold upright + B and Player 2 downright.
Activate Shell in Stage 15 Player 1 should hold Downright + A and Player 2 left.
Activate Shotgun in Stage 01 Player 1: Hold Down. Player 2: Hold A
Activate Shotgun in Stage 02 Player 1: Hold A. Player 2: Hold B
Activate Shotgun in Stage 04 Player 1: Hold Down/Left + B. Player 2: Hold Left/Up