Phineas and Ferb find an egg and believe it's Perry's, and they take care of it until Candace decides to teach them how to properly take care of an egg. Meanwhile, Heinz Doofenshmirtz plans to get revenge on whales for stealing his old girlfriend. / Phineas and Ferb accidentally trap Candace in a video game and have to help her out so that she can get ready for the cotillion. Meanwhile, Perry has to stop Doofenshmirtz from zapping men into wearing ball gowns with the Ballgowninator.