Minor Characters[]
Minor characters have appeared in only one episode.
| Picture | Name | Episode | Description |
| Dave and Rick | "The Fast and the Phineas" | The announcers at the Swamp Oil 500 when Phineas was driving his mother's car. One of them is modeled to look like Dan Povenmire while the other one is made to look like Jeff "Swampy" Marsh. | |
| Unnamed beach dancer (Queen Wahini crowner) | "Lawn Gnome Beach Party of Terror" | An unnamed beach dancer appeared at Phineas and Ferb's beach party. | |
| Bobby Nelson | "Lawn Gnome Beach Party of Terror" | Bobby Nelson is a local Danville surfer. He surfed in the contest held by Phineas and Ferb. | |
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Lorraine | "Get That Bigfoot Outa My Face!" | The titular characters' maternal grandaunt, is the sister of Betty Jo and lives in a closet. (Presumably a closet of Betty-Jo and Clyde). Last name has not been stated yet. |
| Dr. Feelbetter | "It's About Time!" | Dr. Feelbetter appeared in the episode "It's About Time!", as an obvious parody of Dr. Phil, to sort out problems between Heinz Doofenshmirtz, Perry the Platypus and Peter the Panda. | |
| J.B. | "Toy to the World" | President of Har D Har Toy Company, where Phineas and Ferb briefly worked, didn't wear clothes to work once. | |
| Ba-dink-a-dink | "Toy to the World" | The Ba-dink-a-dinks are a race of blue-skinned humanoids who lived under the Har D Har Toy Company's Danville factory. They were released when Phineas and Ferb remodeled the factory to produce the Perry the Inaction Figure toy line. | |
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Charles Pipping IV | "A Hard Day's Knight" | Neighbor of Grandma and Grandpa Fletcher, resembles Jeremy. This resemblance caused Candace to briefly have a crush on him when her family visited London. |
| Stubbings | "A Hard Day's Knight" | The butler of Charles Pipping IV and probably the Pipping Family. | |
| Lloyd Wexler | "A Hard Day's Knight" | Dr. Lloyd Wexler is the evil mad scientist hero of Heinz Doofenshmirtz. | |
| Gaston Le Mode | "Run Away Runway" | Gaston Le Mode is a fashion designer who hired Phineas and Ferb after seeing their designs for the Summer All The Time Collection. | |
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Agent E | "The Ballad of Badbeard" | Agent E is a bald eagle which works for the The Agency. Her base is supposedly located near where Phineas' grandparents live, as this is where her nest is located and the only place we see her. Agent E made her debut in the episode "The Ballad of Badbeard". |
| Boris | "The Flying Fishmonger" | Boris is a giant bully who wears big black boots. Therefore he is known as "Big Black Boots Boris the Bully." He used to constantly kick sand in Dr. Doofenshmirtz's face, especially in places where one would not expect sand. | |
| Unnamed dream Sergeant | "Phineas and Ferb Get Busted" | The Sergeant is a character who appears in Candace's dream which appears to be Perry's dream. He appears to be working at the Smile Away Reformatory School. | |
| Morty Williams | "Phineas and Ferb Get Busted" | Morty Williams is the host of his own investigative reporting television show named "The Morty Williams Show". | |
| Lulu Jones | "Leave the Busting to Us!" | Lulu Jones is a television host who appears in the episode "Leave the Busting to Us!". She is voiced by Vicki Lewis. She is the host of the Danville television show Bust 'Em. | |
| Fifi | "Leave the Busting to Us!" | Fifi is a camera operator that appeared in "Leave the Busting to Us!". She made a cameo appearance in the "Spot the Diff" episode The Fast and the Ferbulous: Danville Drift. | |
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Hildegard Johnson | "Crack That Whip" | Hildegard Johnson is the grandmother of Jeremy Johnson, Suzy Johnson, and a long-standing rival of Betty Jo Flynn from when they were both in the Roller Derby. |
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Conk | "Boyfriend From 27,000 B.C." | Conk was frozen in Danville around 29,000 years years ago. He is a Cro-Magnon. Unfrozen by Phineas and Ferb in their garage, he picked up English extremely quickly including words like "sandwiches." |
| Constance | "The Monster of Phineas-n-Ferbenstein" | Constance is an 18th-century Candace lookalike. She is the disapproving governess of two small scientists, Dr. Phineastein and Ferbgor. She bears a striking resemblance to Candace Flynn in word and deed. | |
| Dr. Phineastein | "The Monster of Phineas-n-Ferbenstein" | Dr. Phineastein is an ancient Victorian scientist who created a monster platypus with the help of his hunchbacked henchman, Ferbgor. He is an obvious parody of Dr. Victor Frankenstein. | |
| Ferbgor | "The Monster of Phineas-n-Ferbenstein" | Ferb Fletcher's Victorian ancestor, assisted a Phineas Flynn look-alike scientist named Dr. Phineastein in creating a Platypus monster. | |
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The Platypus monster | "The Monster of Phineas-n-Ferbenstein" | A platypus monster was a Platypus-based monster that was created by Dr. Phineastein and his assistant Ferbgor during the Victorian age. |
| Jekyll Doofenshmirtz | "The Monster of Phineas-n-Ferbenstein" | Jekyll Doofenshmirtz is Heinz Doofenshmirtz's great great grandfather who created a machine to turn someone into either a fairy or monster. He was last seen about to be eaten by the Platypus monster. | |
| Jameson | "The Monster of Phineas-n-Ferbenstein" | Jameson was Jekyll Doofenshmirtz's butler. He bears a great resemblance to Roger Doofenshmirtz. | |
| Beppo Brown | "Oil on Candace" | Beppo Brown is the father of one of Phineas and Ferb's friends, Django Brown. | |
| Dr. Gevaarlijk | Oil on Candace" | Doofenshmirtz´s old Evil Science professor from Druelselstein. | |
| Mr. McGillicuddy | "Unfair Science Fair" | Mr. McGillicuddy is Baljeet's summer school science teacher. | |
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Wendy | "Unfair Science Fair" | Wendy is a teenage girl, voiced by Brenda Song, and a possible rival to Candace (and probably Mindy) for Jeremy's affections, who appears in "Unfair Science Fair". Competed with Candace to get a position alongside him at Mr. Slushy Burger. |
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Aliens of Mars | "Unfair Science Fair Redux (Another Story)" | Aliens of Mars live on Mars. They also made Candace the Queen of Mars. |
| Hans | "Out to Launch" | Hans is a person that Heinz Doofenshmirtz encountered while performing a shadow puppet show as a teenager. | |
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Only Son | "Got Game?" | Only Son is the dog that Heinz Doofenshmirtz'sfather won in a game of "Poke the Goozim with a Stick". |
| Pinhead Pierre | "Out of Toon" | Pinhead Pierre was the host of a kids' television program that aired in Great Britain called The Pinhead Pierre Show! | |
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Nosey | "The Lake Nose Monster" | Nosey is a sea-monster that lives in Lake Nose. He lives off of zinc, which he absorbs from the water through his skin. |
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Blanca Dechan | "Attack of the 50 Foot Sister" | Blanca Dechan is the original founder of Flawless Girl Cosmetics. |
| P. P. Otter | "Attack of the 50 Foot Sister" | P. P. Otter is a ringmaster working at the Mid-Summer's Festival. | |
| Goldie | "Backyard Aquarium" | Goldie is the name for Phineas and Ferb's new goldfish pet. She was so special to them that they decided to build her an aquarium and get her friends from the ocean. | |
| Agent Double 0-0 | "Elementary, My Dear Stacy" | Agent Double-0 0 is a British spy who appears in Season 2. He helps Agent P defeat Dr. Doofenshmirtz. He actually doesn't know anything about Doofenshmirtz, he only helps Agent P locate him. He has a very good knowledge, but he appears to work like the 19th and 20th century agents. | |
| Elizabeth | "Perry Lays an Egg" | Elizabeth is one of Heinz Doofenshmirtz's ex-girlfriends who has an unhealthy obsession for whales. At present time, she appears to be living inside a whale. | |
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Meap | "The Chronicles of Meap" | Meap is an Intergalactic Security Agent, who travels around the universe helping any planet that was in danger. His nemesis is the evil Mitch. He also made a cameo in the Christmas special. |
| Mitch | "The Chronicles of Meap" | Mitch is Meap's nemesis. He owns a space station wherein he keeps the animals that he poaches. | |
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Balloony | "The Chronicles of Meap" | Balloony was Heinz Doofenshmirtz's best friend back in Gimmelschtump. He is a balloon with a very well made face drawn on it. He was lost one night when he floated away, Heinz tried to grab him but his father told him to stay still because he was being a lawn gnome. |
| Thaddeus | "Thaddeus and Thor" | Thaddeus is the younger brother of Mandy and brother of Thor. He is like Phineas, but is more boastful and competitive, But on a less amazing scale. | |
| Thor | "Thaddeus and Thor" | Thor is the brother of Thaddeus. He shares similar qualities to Ferb, in that he's quiet and helps his brother build things. The difference is that Thor seems to follow Thaddeus's orders | |
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Mandy | "Thaddeus and Thor" | Mandy is the older sister of Thaddeus and Thor and constantly tries to bust them to their mom, much like Candace with Phineas and Ferb |
| Mishti | "That Sinking Feeling" | Baljeet's tomboyish girlfriend from India. | |
| Xavier and Fred | "Phineas and Ferb's Quantum Boogaloo" | Candace's future sons. | |
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Amanda | "Phineas and Ferb's Quantum Boogaloo" | Candace's future daughter, who acts like a reverse version of her mother by begging her brothers to do something cool. |
| Planty the Potted Plant | "No More Bunny Business" | Dr. Doofenshmirtz's make-believe agent fill in for Perry. After foiling Dr. Doofenshmirtz's plans, Monogram makes him an agent. | |
| Dennis | "No More Bunny Business" | A rogue agent who was trying to hack into Perry's lair. | |
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Professor Poofenplotz | "Isabella and the Temple of Sap" | The nemesis of Agent Pinky. |
| Eliza M. Feyersied | "Fireside Girl Jamboree" | Founder of the Fireside Girls. | |
| Wendy Stinglehopper | "Phineas and Ferb Christmas Vacation!" | A girl who is kissed by Baljeet | |
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Tiana Webber | "Candace's Big Day" | The Aunt of the Boys and Candace. Linda's sister |
| Unnamed hotel manager | "Phineas and Ferb Hawaiian Vacation | The hotel manager in Hawaii when the Flynn-Fletcher Family goes to Hawaii | |
| Unnamed bully | "Voyage to the Bottom of Buford" | The bully nearly ate Buford's goldfish, Biff. | |
| Sabu | "Phineas y Ferb: Tuyo el verano es!" | Baljeet's uncle who owns a rubber band factory | |
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Melissa | "El Laberinto" | One of the younger Las Exploradoras |
