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Professor Xavier Onassis is an 19th century scientist who invented a time machine. The time...
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|current||06:40, June 9, 2012||500 × 500 (152 KB)||TheHeartlessHero|
|04:07, November 9, 2009||640 × 476 (57 KB)||RRabbit42||Xavier Onassis, scientist and inventor of the time machine seen in "Rollercoaster", "It's About Time!" and "Phineas and Ferb's Quantum Boogaloo".|