A visit to a dude ranch turns into a cattle drive through town for Phineas, Ferb, and Isabella. Meanwhile, Dr. Doofenshmirtz starts an aluminum siding business by making the Termite-Controlling Helmet to control termites. A cowboy in a western movie is singing On the Trail, accompanied at by...
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Doof planned to use a termite controlling helmet to eat the wood in the Tri-state area.so he could sell aluminium siding.
Inspired by a race in the distance, Phineas and Ferb upgrade Mom's car into a race car, and enter it in the Swamp Oil 500. Candace tries to bust them by surprising Linda with what they're doing, but keeps failing. Elsewhere, Dr. Doofenshmirtz tries to deflate everything in the Tri-State Area...
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He built a deflate-inator in order to force people to come to him to get their things inflated. Maybe he sells bicycle pumps?
Phineas and Ferb help Candace learn how to parallel park by building a monster truck track in the backyard. Meanwhile, Dr. Doofenshmirtz is marketing his new line of monster trucks to investors, and proceeds to try and get rid of the competition. Linda takes a look out into the backyard and sees...
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He planned to destroy all the monster trucks in the Tri-state Area so people would buy his own line of monster trucks.
Phineas and Ferb try to set the world record for the world's largest bowling ball as well as the largest pinball table. Meanwhile, Dr. Doofenshmirtz dabbles in selling addictive hot chocolate. Candace is talking on the phone with Stacy telling her that Jeremy asked Candace to meet him by the...
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He planned to freeze the Tri state area so he could sell his brand of hot chocolate
Phineas and Ferb decide to find out what Perry's chatter means. Meanwhile, Candace tries to spend some time with Jeremy, but she keeps being interrupted by Suzy's poodle. Dr. Doofenshmirtz tries to flood the Tri-State Area and invents a vehicle that drives on water. Phineas and Ferb are sitting...
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He planned to flood the city so he could sell B.O.A.Ts
Since their pet goldfish did so much for them, Phineas and Ferb build an aquarium in their backyard as a way of saying thanks. Meanwhile, Candace awaits a call from Jeremy, and Perry has to stop Doofenshmirtz from destroying hot dog vendors. Phineas and Ferb have a new goldfish, which they name...
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He planned to freeze hotdog vendor water so he could sell bratwurst.
The family becomes marooned after a summer storm shipwrecks them on an island, and Phineas, Ferb and Isabella use the opportunity to build a tree house. Meanwhile, Candace tries to get them to build a boat so she can get back in time for Jeremy's party. After finding out what "big laundry"...
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He uses enslaved monkeys to run a laundromat.
Candace is determined to win this year's father-daughter obstacle course, but Lawrence finds Agent P's lair and his memory is accidentally erased. Carl has Agent P operate a Lawrence robot to fill in during the race. Meanwhile, Dr. Doofenshmirtz invents a solution that works the opposite of...
phineasandferb.fandom.com
He invented "eulg" a chemical which takes things apart instead of sticking them together. I'm guessing it is an industrial solvent.
After watching an all night science-fiction movie marathon, Candace is convinced that Ferb is an alien and gathers evidence to prove it. Meanwhile, Dr. Doofenshmirtz is trying to sell an evil inator under the guise of it being a cleaning device. Candace gets annoyed when she hears screaming. It...
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Doofenshmirtz created an inator for wrapping parcels and put it up for auction. Possibly he has sold other inators off-screen.
Phineas and Ferb build the ultimate lemonade stand and begin to offer franchise opportunities. Meanwhile, Candace and Stacy's relationship is put to the test when Candace feels she must pick between their friendship and busting her brothers. Dr. Doofenshmirtz creates a Paper-Cut-inator so that...
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Doof made a papercut-inator so he could make money selling bandaids.
After Candace injures her ankle and is told to stay in bed, she drives herself crazy trying to get her Mom's attention in order to bust her brothers. Fortunately, Phineas and Ferb provide her with a box of items to stave off her boredom. Meanwhile, Perry interrupts Dr. Doofenshmirtz's Chicken...
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He planned to destroy a delicatessen that messed up his food so he could make a new one.
Baljeet confesses that he is the descendant of a long line of bicycle race losers. Phineas and Ferb enlist the help of cyclist Greg LeMond to help Baljeet compete in a bicycle race. Meanwhile, Doofenshmirtz uses his Pop-up-inator to annoy everyone in the Tri-State Area to make millions. Phineas...
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He planned to use an inator to spread his popup ads across the Tri-State area.
The boys create a new invention using recycled parts from past projects. Mom is too exhausted from baking pies all night and begins hallucinating, even to the point of actually seeing Phineas and Ferb's big idea. Meanwhile, Doofenshmirtz, after learning that one of his inventions is used for...
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Doofenshmirtz invented and gets royalties from an opthalmologist's chair.
After Candace injures her ankle and is told to stay in bed, she drives herself crazy trying to get her Mom's attention in order to bust her brothers. Fortunately, Phineas and Ferb provide her with a box of items to stave off her boredom. Meanwhile, Perry interrupts Dr. Doofenshmirtz's Chicken...
phineasandferb.fandom.com
He planned to destroy a delicatessen for messing up his order and so he could replace it with his own delicatessen
The boys set out to prove the existence of the elusive Chupacabra to the world, but Candace can't stand the wait and first just needs to prove it to Mom. Meanwhile, Doofenshmirtz has the brilliant idea to use his Switch-Place-inator to remove hair from one person and give it to another so that...
phineasandferb.fandom.com
He planned to use an inator to take people's hair so they would buy his hair growth tonic.
Doof 'N' Puss, or Doof 'N' Puss [[[in SOUND]]], was a potential television series created by Dr. Heinz Doofenshmirtz starring himself and Perry the Platypus as undercover crime fighters, Doof and Puss. Creator Dr. Heinz Doofenshmirtz attended a science fiction and fantasy convention with the...
phineasandferb.fandom.com
He pitched a tv series idea to a producer at a scifi convention. The producer rejected Doof's idea then made his own version of the series without giving Doof credit (I think?)
Candace thinks her day will be easy when the boys actually ask her to get Mom if they get stuck in their gigantic reproduction of the Gordian Knot, but when Jeremy stops by and asks for her help to open his personal mini safe, she finds her day getting a little more complicated. Meanwhile...
phineasandferb.fandom.com
He planned to make a drusselstein all-you-can -eat buffet restaurant selling terrible food and use an inator to drive the other buffet restaurants out of business.
Phineas and Ferb create their own model solar system and have a planet race while Candace tries to multitask by doing her chores and playing a Ducky Momo game at the same time. Meanwhile, Doofenshmirtz leads a motivational seminar for inventors. Candace is in her bedroom playing an MMORPG...
phineasandferb.fandom.com
Doof runs a seminar where he zaps people with a motivate-inator that makes them want go buy his merchandise.