I think it's called Time Travel Bugaloo(or something like that). Anyway, the full body cast is the result of the failed mission that allowed Doofensmirtz to take over the tri-state area. Now the evil doctor has renamed everyone Joe to avoid learning their real names.
The episode is called "Toy To the World!"
chez platypus
"Chez Platypus"
that
"Interview with a platypus."
No Doofenshmirtz did not miss a episode on Phineas and Ferb.
Perry the Platypus, is from the animated TV series Phineas and Ferb. He is featured as the star of the B-Plot for every episode of the series, alongside his arch nemesis Dr. Heinz Doofenshmirtz.
The episode is called "Toy To the World!"
that
"Chez Platypus"
chez platypus
"Interview with a platypus."
Rick Cowling sings "The Way of the Platypus" featured in the episode "Doof Dynasty" from Season 3 of Phineas & Ferb.
According to Wikipedia it is Sheena Easton
Isabella is on skates buford is on the skate board baljing on the scooter Phineas and ferb on bikes
So first you have the opening, and the totally first song in the show is ..........Perry the Platypus Theme Song - in episode Rollercoaster
The series never says, but there are many fan theories. Most of them think that Dr. Doofenshmirtz is their real father. Here are some theories related with with their real father: http://disappearedflynn.wordpress.com/ in one of Dr. Doofenshmirtz flash backs the one where the phineas and ferb reverse engineer Dr. Doofenshmirtz inventions he was dating Linda (Phineas's blood mom) so that might mean that he had Phineas with her.