Perry the Platypus Theme

Perry the Platypus is the theme song played when Agent P is doing his missions to stop Dr. Doofenshmirtz. The song was first sung fully at the end of the first episode, "Rollercoaster", and since then, small parts of the song (mainly "dooby dooby doo ba") have been sung on Perry's missions. It was a votable song in Phineas and Ferb Musical Cliptastic Showdown but did not make the final cut.

Lyrics

 * Backing scat: (Dooby dooby doo-bah) X4
 * Female Singers: Perry!
 * Male Singer: He's a semi-aquatic, egg-laying mammal of action!
 * Backing scat: (Dooby dooby doo-bah) X2
 * Male Singer: He's a furry little flatfoot, who'll never flinch from a fray-ee-ay-ee-ay!
 * He's got more than just mad skill,
 * Female Singer: (Wah-ah-ah)
 * Male Singer: He's got a beaver's tail and a bill,
 * Female Singer: (ah-ah)
 * Male Singer: And the women swoon whenever they hear him say:
 * pause; Perry chatters and women faint)
 * Male Singer: He's Perry, Perry the Platypus!
 * (Extension as heard in One Good Scare Ought to Do It!)
 * Major Monogram: But you can call him Agent P.
 * Male Singer: Perry!
 * Major Monogram: I said you can call him Agent P!
 * All Singers: A-gent-P!

Album Version

 * Doo-bee-doo-bee-doo-bah(5x)
 * Doo-bee-doo-bee-doo-bah (Yeah)
 * Doo-bee-doo-bee-doo-bah
 * Doo-bee-doo-bee-doo-bah (C'mon!)
 * Perry!
 * He's a semi-aquatic egg-layin' mammal of action
 * (Doo-bee-doo-bee-doo-bah, doo-bee-doo-bee-doo-bah)
 * He's a furry little flatfoot who'll never flinch from a fra-ee-ay-ee-ay
 * He's got more than just mad skill
 * He's got a beaver tail and a bill
 * And the women swoon whenever they hear him say...
 * (pause; Perry chatters and women swoon)
 * He's Perry, Perry the Platypus
 * Perry, Perry the Platypus
 * Doo-bee-doo-bee-doo-bah(8x)
 * Well he's lookin' real sharp in his 1940s fedora
 * (Doo-bee-doo-bee-doo-bah, doo-bee-doo-bee-doo-bah)
 * He's got an iron will, nerves of steel, and several other metal-themed attributes
 * His fur is watertight
 * And he's always up for a fight
 * So when evil hears this sound it shakes in its boots
 * (Perry chatters)
 * He's Perry, Perry the Platypus
 * Perry, Perry the Platypus
 * He's got more than just mad skill
 * He's got a beaver tail and a bill
 * And the women swoon whenever they hear him say...
 * (Perry chatters and women swoon)
 * He's Perry (Perry), Perry the Platypus
 * Yeah, Perry (Perry), Perry the Platypus
 * Talkin' 'bout Perry
 * Agent P

Phineas and Ferb and the Temple of Juatchadoon version

 * Background scat: (Dooby dooby doo-bah) X4
 * Female Singers: Perry!
 * Male Singer: He's a semi-aquatic, egg-laying mammal of action!
 * Female Singers: With a fez!
 * Male Singer: He's got more than just mad skill!
 * He's got a beaver tail and a bill!
 * Female Singers: And a fez!
 * Male Singer:He's Perry, Perry the Platypus!
 * Major Monogram: But you can call him Agent P.
 * Male Singer: Perry!
 * Major Monogram: I said you can call him Agent P!
 * Male Singer: A-Gent P!

Errors

 * When Perry is beating Doofenshmirtz with his own robot, the second time he doesn't even hit the button, but Doofenshmirtz is hit anyway.
 * In the "Phineas and Ferb and the Temple of Juatchadoon" version, at one point in the song, Isabella is in the cage with Phineas, Ferb, and Candace and then is later seen in the pit with her mother.

Variations
Since its introduction, the short version of the theme song ("Dooby, dooby, doo-ba") has had many different versions:
 * Does This Duckbill Make Me Look Fat?: The theme music stalls multiple times as Perry in Candace's body repeatedly gets stuck going down a tube. In addition, a parody of Perry's normal theme song, "Perry the Teenage Girl", is also featured.
 * Ready for the Bettys: When Phineas and Ferb accidentally find Perry's lair and temporarily become secret agents, the theme song is changed to repetitions of "Phineas and Ferb", sung in the same style.
 * The Best Lazy Day Ever: When Agent P is struck by the Slow-Motion-Inator, his theme song slows down as well.
 * Got Game?: After Agent P walks down a very long flight of stairs and sits down in the chair, the people singing his theme song also sound like they are worn out.
 * Hail Doofania!: When Perry cannot enter his lair due to the protective collar he is wearing, the song keeps repeating every time Perry tried to fit himself in the secret passage.
 * Put That Putter Away and Hide and Seek: Due to Perry being tired, both his entrance and the singers sound sleepy.
 * Oh, There You Are, Perry: Perry's theme song is used as a musical access code, played out when Perry steps on the stones in the yard.
 * The Chronicles of Meap: Perry's anthem begins playing as he approaches a lair entrance, but when he comes across Meap, he hides his hat and the music stops. Meap and Perry have a "conversation" ("Meap!" "chatter" "Meap!" "chatter" "Meap!"), then Meap walks away. Perry puts his hat back on and the music continues from where it stopped.
 * Phineas and Ferb's Quantum Boogaloo: The song is played very slowly and has a big gasp between it, as if sung by old men, because Perry is very old.
 * Phineas and Ferb Musical Cliptastic Countdown: The song is sung by the studio audience.
 * Isabella and the Temple of Sap: Perry does not have a B-plot, but it is revealed that Pinky the Chihuahua's theme song even as an agent is mariachi band music.
 * Atlantis: Perry goes to the deck and there's a man playing a guitar and singing "Dooby Dooby Doo-Wah".
 * Phineas and Ferb Christmas Vacation!: The "Dooby Dooby Doo-Ba" is replaced with a more festive "Fa-La-La-La-La-La", as taken from the Christmas carol "Deck the Halls".
 * Suddenly Suzy: Carl plays the tune with his single facial hair. Major Monogram found it disgusting and fascinating at the same time.
 * Moon Farm: After Perry was zapped by the Moisturesuckinator, his theme sounded as if it were "dried out" just like Perry.
 * Phineas and Ferb Interrupted: Heinz Doofenshmirtz sang the first line of the song in his bathroom.
 * Phineas and Ferb The Movie: Across the 2nd Dimension: Perry the Platyborg's theme is heard every time he is seen when he's an evil cyborg just like Perry when he is a secret agent but in a lower scale.
 * Skiddley Whiffers: Perry plays the tune with a guitar to enter his lair.
 * Doof Dynasty: A version of the theme was played as Perry leaps away from the mechanical dragon and the kids eject from the giant terracotta warrior.
 * Phineas and Ferb and the Temple of Juatchadoon: Showgirls accompany Perry in his entrance, and sing 'in a fez' in the background.