Fred (Phineas and Ferb)

Fred is one of Candace Flynn's future children. He is the brother of Xavier and Amanda.

Biography
He and his brother Xavier are generally quite inactive, and constantly to make note of how they are sitting in front of the digital tree in his backyard of the family, much to the chagrin of their sister Amanda.

His life takes a turning point, however, when by chance receives a visit from the age younger versions of his uncles, Phineas and Ferb. After the previous visit, Xavier and Fred build bumper cars that can move in five dimensions, but they still answer Amanda's questions about their activities with "Nothing", which bothers her to no end ("Phineas and Ferb's Quantum Boogaloo").

Personality
Xavier and Fred are as bright and creative, and build impossible stuff just like Phineas and Ferb, although it took the younger version of their uncles to bring it out of them. Fred keeps talking about being next to something the few times he talks ("I'm sitting next to him", "I like the guy standing next to him"). (Phineas and Ferb's Quantum Boogaloo)

Physical Appearance
Fred has blue eyes and brown hair. He wears a white shirt with a red vest covering it, white shorts, and red sneakers.

Background Information

 * He and Xavier are about the same age, which means it can be twins if not brothers. Fred and Xavier aren't really interested in building things like Phineas and Ferb, Amanda is always whining about how they never do anything. That is until Phineas and Ferb give them an idea to create 5th dimensional bumper cars.
 * Candace mentioned that in the future she will marry Jeremy and have two kids: Xavier and Amanda. Fred's inclusion is almost certainly intended as a play on this theme, which implies that, alternatively, Candace finally changed plans or had more children than she expected. This problem is further complicated by the assumption that Jeremy is married to Candace, on the basis of genetics in the real world, a redhead and a blonde having a brunette child would be very unlikely. It's possible that if his father is Jeremy, that his hair is a mixture of Candace's orange hair and Jeremy's blonde hair. The gene for brown hair may have skipped a generation or so, but there has been no evidence of that situation so far, all known Flynns red hair or natural hair color is unknown, and most known Johnsons are blond. There is one Johnson who is known to be brunette, however. As in the episode "Run, Candace, Run", Candace uses the speed shoes and returns a missing family member who is, in fact, brunette. It's also possible that Fred is a step-brother to Xavier, to parallel, Phineas and Ferb. There is also a possibility that Fred is adopted or has dyed his hair.
 * Unlike Phineas and Ferb, their mother (Candace) sees that they've created the 5th dimensional bumper cars, but when Amanda says "See Mom, they never do anything!" Candace simply says "Give it a rest, Amanda."
 * Like his uncle Ferb, he doesn't talk much and lets his brother do most of the talking.