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Irving Du Bois[3][4] is a recurring character on Phineas and Ferb, and is one of the tritagonists; he is Phineas and Ferb's self-proclaimed biggest fan.
Irving Du Bois
Phineas and Ferb Will Return in Avengers: Doomsday
for Phineas and Ferb Will Return in Avengers: Doomsday in Everyone Will Return in Avengers: Doomsday
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Everyone Will Return in Avengers: Doomsday
