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Cheats for Jimmy Neutron Boy Genius: Attack of the Twonkies for GameCube
By Unknown
Here are all the known cheat codes for Jimmy Neutron Boy Genius: Attack of the Twonkies for GameCube
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If You know any more cheats codes please send Them in!
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Inventions
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To tell if you can make a invention, there will be a box on the top right of the screen.
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Extra challenges
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Finish retroland level.
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Extra level
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Finish the game.
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Extra level
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Finish the game.
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