Baby Bum ) as Young Johnny McGowan * Godzilla ( Godzilla 1998 ) as Yowler the Dragon * Mia ( Little Baby Bum ) as Miss Twittingham * Aladar (Dinosaur 2000 ) as Beth Armstrong * Gorilla as Bob Armstrong * Eduardo (Fosters Home for Imaginary Friends ) as Lester MacIntyre * Dad ( Rolie Polie Olie ) as Brownie McGee * Elephant as Mrs. Cosgrove * Trello ( Bear in the Big Blue House ) as Angus McGowan