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- Two of the game's bosses (Lololo and Lalala) are references to one of HAL Laboratories' earlier game series, Adventures of Lolo.
- The "Computer Virus" boss is a reference to the similar look and style of many console role-playing games. As you battle him, various status messages will appear in the text window on the screen.
- The ending of the game Revenge of Metaknight is very similar and possibly modeled after the original Lupin the Third episode ending animation.