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"Gum me!"
— Thaddeus to Thor[src]

Thaddeus is the nephew of Mrs. Weaver, next-door neighbor of the Flynn-Fletchers. Thaddeus, Thor and Mandy were visiting their aunt for the weekend. He has a catch line just like Phineas. As for Thaddeus it's "Gum me." He bears a strong physical resemblance to Phineas, but with curly brown hair and glasses, although his clothing style resembles Ferb's in that he wears high pants. Thaddeus is arrogant and confident of his and Thor's building skills, challenging Phineas and Ferb to see who can build the best backyard fort ("Thaddeus and Thor").

While nowhere near the level of Phineas and Ferb, Thaddeus and his brother, Thor show an impressive skill in building and design, considering that their fort is beyond what most other normal children could create, especially in such a small amount of time.

Relationships[]

Thor, Mandy and Mrs. Weaver would be the only relationships Thaddeus has that are known for now. Thor is his brother (possibly step-brother) and seems to be a vaguely fat Ferb. Both are builders, and stand in shock at Phineas and Ferb's fort. Mandy took them home and said "Nice going. You broke their brains! Come on boys, I'm taking you home."

Appearances[]

v - e - dCitizens of Danville
Kids
Phineas Flynn | Ferb Fletcher | Baljeet Tjinder | Buford Van Stomm | Isabella Garcia-Shapiro | Gretchen | Holly | Katie | Milly | Ginger Hirano | Adyson Sweetwater | Melissa | Fireside Girl (blond) | Fireside Girl (brunette) | Fireside Girl (brown) | Suzy Johnson | Irving Du Bois | Django Brown | Balthazar Horowitz | Pedro
Pinhead Pierre actress | Cindy | Dimitri Popaunicolas | Sally | Buford's replacement nerd | Bad Singing Kid
Teens
Candace Flynn | Vanessa Doofenshmirtz | Jeremy Johnson | Stacy Hirano | Jenny Brown | Birgitte | Mindy | Wendy | Coltrane | Carl Karl | Johnny | Albert Du Bois | Chad | Sassy Miss K | Jeremy's unnamed drummer | Lacie | Carla | Monty Monogram | Jeremy and Coltrane's friend | Heather | Dana | Milo Murphy
Adults
Linda Flynn-Fletcher | Lawrence Fletcher | Heinz Doofenshmirtz | Charlene Doofenshmirtz | Mrs. Johnson | Jack Johnson | Danny, Sherman, Bobbi Fabulous (Love Händel) | Dr. Hirano | Vivian Garcia-Shapiro | Beppo Brown | Francis Monogram | J.B. | Roger Doofenshmirtz | P. P. Otter | Ben Baxter | Clyde Flynn | Betty Jo Flynn | Melanie | Biffany Van Stomm | Esmeralda Poofenplotz | Wanda Acronym | Bridgette Oshinomi | Boris | Mr. McGillicuddy | Lewis | Lewis's fiancée | Khaka Peü Peü | Eliza M. Feyersied | Dr. Diminutive | Dr. Bloodpudding | Crazy Old Coot | Aloyse von Roddenstein | Mrs. Tjinder | Mrs. Du Bois | Stanky Dog | Doofenshmirtz's ex-girlfriend | Annabelle Johnson | Elizabeth | Mrs. Khaka Peü Peü | Glenda Wilkins | Mrs. Thompson | André Guilbaud | Don | Mother and Daughter | Du Bois Landscape Artists | Principal Lang | Mrs. Pierpoint
Animals
Perry the Platypus | Pinky the Chihuahua | Terry the Turtle | Peter the Panda | Johnson family poodle | Biff | O.W.C.A. | Goldie | Starnose Mole | Steve
Robots
Norm | Chloe | Dr. Killbot | Super Computer | Rover | Jerry the Platypus
Future
Amanda | Xavier | Fred | Candace (alternate realities) | Heinz Doofenshmirtz (alternate reality)
Groups
Fireside Girls | Phineas and the Ferb-Tones | The Baljeatles | Jeremy and the Incidentals | Doofenshmirtz Evil Incorporated | Love Händel | O.W.C.A. | L.O.V.E.M.U.F.F.I.N.
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