To tell you if it's possible to create an invention, there will be a box on the top right of the screen.
The Adventures Of Jimmy Neutron Boy Genius: Attack Of The Twonkies unlockables:
Unlockable: How to Unlock:
Unlock Bonus challenges - Successfully complete the Retroland level.
Unlock Bonus Jetpack race level - Successfully complete the game.
Unlock Inventions - To tell if you can make a invention, there will be a box on the top right of the screen.
Defeating the bully:
Use the following trick to defeat the bully who throws rocks. When he gets near the gap use the Sprink Ray. You will have to use it about four or five times.
Run around in circles and jump. You will jump higher and in a circle.
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