King Neptune's Adventure Cheats
King Neptune's Adventure cheats, Tips, and Codes for NES.
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You need two controllers attached to the console to make this trick work. Anytime during gameplay, press and hold the Up and A buttons on controller 1 while holding Up on controller 2. Then press B on controller 1 to activate infinite bubble bombs.
Anytime during gamplay, press and hold Up + A on controller 1 while holding Up on controller 2. Then press A + Select on controller 1 to unlock infinite lives.