Who knows Phineas and Ferb??

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Phineas Flynn, also known as Dinner Bell by Buford, is a boy in the Flynn-Fletcher family. He is the son of Linda Flynn and stepson of Lawrence Fletcher. His sister is Candace, and his stepbrother is Ferb. He is friends with Buford, Baljeet, and Isabella, who has a strong crush on him (if he returns it is so far unknown). He has a strong bond with Perry, their pet platypus, and he always wonders where he is.
An incurable optimist, Phineas constantly looks on the brighter side of things. He is as well extremely smart, creative, and persistent, causing him to build immensely large inventions and activities with the help of his stepbrother. He is kind, which sometimes has an effect on his plans.

Born in America in the 90s, Phineas lives in the town of Danville. As a baby, Phineas's mother, Linda, met and fell in love with Ferb's father, a British archaeologist named Lawrence Fletcher at a Love Händel concert. Eventually the two got married, and Phineas and his sister, Candace, gained a step-dad and a stepbrother named Ferb.

Phineas was raised in what is called a "blended family", but being since he lived like this his whole life, it felt more as a normal, average, American family. Phineas and his sibling are such sometimes confused by their mother as being their stepfather's birth children, such as being told they have his imagination

"Ferb" Fletcher is a British Fletcher child currently living in Danville. He is the stepson of Linda Flynn and son of Lawrence Fletcher. He has a stepsister named Candace, and a stepbrother named Phineas. He is friends with Buford, Baljeet, and Isabella. Also, Ferb has a crush on Vanessa.
Very laconic, Ferb is not actually shy like one would assume, but very courageous and clever. Quick thinking and on his feet about things, Ferb is a mechanical and technical genius, Ferb has built a plethora of things, from a roller coaster to a rocket to robots.

Ferb was born in England to Lawrence Fletcher and an unnamed mother. Eventually, Ferb and his father moved to Danville. There, Lawrence met a woman named Linda Flynn and fell in love with her at a Love Händel concert

 Phineas realizes that summer doesn't last forever, and decides to make summer last by doing outrageous things. Phineas and Ferb decide to build a rollercoaster that extends from their backyard to all over town. Not only did they create a rollercoaster, but they created a beach in their backyard as well, where Ferb sang his first song, Backyard Beach. A short while after that, Ferb became a member of the Phineas and the Ferb-Tones, where they became one-hit wonders in just a day ("Rollercoaster", "Lawn Gnome Beach Party of Terror", "Flop Starz").