Cast[]
- Big Bird (from Learning About Numbers) as Phineas Flynn
- Elmo (from The Best of Elmo) as Ferb Fletcher
- Prairie Dawn (from Bert and Ernie's Word Play) as Candace Flynn
- Barkley (from Get Up and Dance) as Perry the Platypus
- Oscar the Grouch (from Slimey's World Games) as Dr. Doofenshmirtz
- Zoe (from Kids' Favorite Songs) as Isabella Garcia-Shapiro
- Baby Bear (from Do the Alphabet) as Baljeet
- Herry Monster (from Monster Hits!) as Buford van Stomm
- Telly Monster (from Sing Yourself Sillier at the Movies) as Jeremy Johnson
- Bert (from The Best of Ernie and Bert) as Major Monogram
- Ernie (from The Best of Ernie and Bert) as Carl Karl
- Ingrid (from 123 Count with Me) as Linda Flynn-Fletcher
- Humphrey (from 123 Count with Me) as Lawrence Fletcher
- Betty Lou (from Do the Alphabet) as Stacy
- Grizzy (from The Adventures of Elmo in Grouchland: Sing and Play) as Vanessa Doofenshmirtz
- Mary (from Elmo's Sing-Along Guessing Game), Herry's Mother (from Monster Hits!), Gladys the Cow (from We All Sing Together), Polly Darton (from Sing Yourself Silly!), Sherry Netherland (from 123 Count with Me) and The Cereal Girl (from Let's Eat: Funny Food Songs!) as The Fireside Girls
- Irvine (from Learning About Letters) as Suzy Johnson
- Rosalita (from Fiesta!) as Jenny Brown
- Grover (from Monster Hits!) as Django Brown
- Kingston Livingston III (from Elmo Says Boo!) as Irving
- Benny Rabbit (from 123 Count with Me) as Albert
- Frazzle (from Monster Hits!) as Norm
- Little Jerry (from Rock & Roll!) as Danny
- Big Jeffy (from Rock & Roll!) as Bobbi Fabulous
- Rockin' Richard (from Rock & Roll!) as Swampy
- Herry's Granny (from Monster Hits!) as Mrs. Johnson
- Flo (from Bert and Ernie's Word Play) as Vivian Garcia-Shapiro
- Grundgetta (from Sing Yourself Silly!) as Charlene Doofenshmirtz
- Guy Smiley (from Play-Along Games and Songs) as Monty Monogram
- Billy Monster (from Monster Hits!) as Meap
- Dimples the Dog (from The Alphabet Game) as Pinky the Chihuahua