In the options screen, press the following buttons:
Effect Code 8th Difficulty Up, Up, Down, Down, Left, Right, Left, Right, B, A. Round Select Up, Right, Down, Left, X, A, B, Y.
Contributed By: ReyVGM.
Highlight Octopus on the character selection screen, and hold Up+L+X for around 30 seconds. A menu will then be displayed allowing you to select your starting stage, scene, and ''Mutek'' (set it to 01 for a fully powered up, invincible ship)
Contributed By: PentarouZero.
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