All weapons
Press A, B, Y, X, Y, B, A at the options screen.
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Fireworks
Successfully complete the game, then return to the screen with the "Start Game", "Load Game" and "Options" selections to see fireworks.
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Level select
Press Left, Up, X, Up, Right, Y when "Press Start" appears on the opening screen. The screen will flash to confirm correct code entry. The level selection screen will appear when a new game is started.
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Unlimited health
Press L + R + Y + A + Analog-stick Left when "Press Start" appears on the opening screen. The screen will flash to confirm correct code entry.
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