Phineas and Ferb/Sesame Street

Cast

 * Phineas as Ernie
 * Ferb as Bert
 * Suzy as Abby
 * Dr. Doofenshmirtz as Oscar the Grouch
 * Perry as Cookie Monster
 * Grandpa Reggie as Elmo's Dad
 * Linda as Elmo's Mom
 * Candace as Lulu
 * Jenny as Alice
 * Bobby as The Amazing Mumford
 * Carl as Baby Bear
 * Pinky as Barkley The Dog
 * Alternate Doofenshmirtz as Benny Rabbit
 * Baljeet as Elmo
 * Buford as Don Gourdon (From VeggieTales)
 * Stacy as Betty Lou
 * Major Monogram as Biff
 * Lawrence as Big Bird
 * Albert as Fat Blue
 * Clyde as Forgetful Jones
 * Alternate Buford as Frazzle
 * Jeremy as Grover
 * Roger Doofenshmirtz as Guy Smiley
 * Alternate Jeremy as Herry Monster
 * Sherman as Hoots the Owl
 * Meap and Talking Zebra as The Martians
 * Tour de Ferb Fireside Girl as Zoe
 * Alternate Candace as Rosita
 * Norm as Snuffleupagus
 * Irving as Telly Monster
 * Isabella as Prairie Dawn
 * Dr. Baljeet as Count von Count