Turned back into his normal age, he finds Mandark again, discovering that he has set a bomb to go off to destroy Dexter's large fish tank, filled with salt water that will destroy the lab. Dee Dee, having followed closely, suggests a game of wills against the two, bribing Mandark to play by promising to kiss him; if Mandark loses, he must give up the code that will deactivate the bomb. Losing to Dexter in both a chemistry experiment and ice hockey, Mandark gives a moot code in response. However, Dexter had seen through it and has successfully deactivated the bomb, saving the lab. Defeated, Mandark leaves while vowing revenge. Though all seems well, the game ends with Dee Dee angering Dexter by trashing one of his equipments.