Badass Bookworm: His peanut butter and jelly sandwich gun, the memory scanner, fixing the time machine, eventually building Carl the robot, and the other numerous inventions he's done in the future with the Robinson Industries.
Bungling Inventor -> Gadgeteer Genius: Many of the inventions he's made have not always worked, i.e. the PB&J gun. In the climax, with a newly regained confidence, Lewis manages to fix the time machine, as well as create the future inventions that are used in the future.
Child Prodigy: He is ridiculously intelligent. Obviously he develops into a Teen Genius, as he ends up graduating from college at fourteen.
Doorstop Baby: His birth mother left him on the doorstep of the orphanage that he would grow up in for 12 years.
Dumb Blonde: Inverted. Lewis is a blonde who also happens to be one of the smartest characters Disney has ever made.
Future Badass: What he becomes in the future as Cornelius. Many of the inventions he's built have really helped people. Lewis even learns he has his own invention company.
Missing Mom: He constantly obsesses about her, and once he's introduced to the concept of time-travel, desperately wants to meet her. When he finally goes back in time to where he was left as a Doorstop Baby, he decides to leave his biological mother be after seeing her cradling the baby she's about to give up.
My Future Self and Me: Lewis and Cornelius. Confused? Cornelius is the name Lewis gives himself in the future.
My Greatest Failure: After Goob explains why he "turned evil", Lewis starts seeing his semi-abusive behavior of young Goob as this and fixes it by waking Goob up in time for him to win at an important baseball game.
Nerd Glasses: He wears the stereotypic round glasses that most scientists or nerds wear.
Science Hero: The hero who has been making his own inventions probably before he was 12.
"Bowler Hat Guy" MikeYagoobian and DOR-15
"Bowler Hat Guy" Voiced by: Steve Anderson, Matthew Jonsen (younger, as Michael "Goob" Yagoobian)
DOR-15 Voiced by: Ethan Sandler
"Everyone will tell you to let it go and move on, but don't! Instead, let it fester and boil inside of you! Take these feelings and lock them away. Let them fuel your actions. Let hate be your ally, and you will be capable of wonderfully horrid things."
A.I. Is a Crapshoot: Doris. She was invented to be as helpful as Carl, but she's teams up with Mike, and is ultimately revealed to be the true Big Bad.
Freudian Excuse: Mike blamed Lewis for making him miss the winning ball for his team, which got him beaten up. The loss took a toll on him that he never got adopted and stayed in the orphanage until he hit his thirties.
Green-Eyed Monster: The director's commentary states that jealousy of Cornelius Robinson is Bowler Hat Guy's entire motivation for his villainy.
Harmless Villain: Until he meets Doris, and even then he is hopelessly incompetent at being evil.
Hypercompetent Sidekick: Doris appears to be this to Bowler Hat Guy for most of the movie. The truth is a lot more sinister: she's actually the one who's manipulating him in her own plan for world domination.
In-Series Nickname: Everyone, or at least Wilbur and Lewis, refers to him as "Bowler Hat Guy". His childhood nickname was "Goob".
Obsessed Are the Listmakers: Bowler Hat Guy loves checklists and is often seen ticking off items in his, such as "Steal time machine", "Ruin science fair", and "Get that [comic book swearing symbols] boy".
Unwitting Pawn: Bowler Hat Guy to Doris. Turns out Doris was only using Bowler Hat Guy's hatred for Lewis to trick him into getting the time machine, so he could he use it to steal one of Lewis's inventions and make a lot of money. Then, Bowler Guy would use the money to build more Dorises. Then, the real Doris would have her clones enslave the humans.
Woobie, Destroyer of Worlds: When his motivation is revealed. Goob, who finally snaps when his life goes downhill due to Lewis unintentionally causing him to miss the ball. Even if he's not intending for the world to hit the Bad Future that The Man Behind the Man is trying for, the fact is, he is still looking to deliberately ruin the man responsible for much of the awesome tech that the future runs on, thereby making a future that's much less advanced (if not quite a Crapsack World).
Voiced by: Wesley Singerman
Badass: He escaped from a T-Rex just using a meatball shooter!
Badass Adorable: His facial expressions and being able to take down a T-Rex.
I Gave My Word: Lewis makes him promise to bring him to his biological mother after everything has blown over. After everything has been sorted out, Wilbur keeps his promise and brings Lewis to his real mother's house. Thanks to Character Development, Lewis decides to leave it a mystery so he can focus on his other—and in his eyes, true—family.
Kid from the Future: He turns out to be Lewis's future son. Wilbur came back from the future to protect his dad from the Bowler Hat Guy. Things got complicated.
Nobody Here But Us Birds: Wilbur does this, while trying to get Lewis to not give up on the memory scanner, resulting in Lewis' annoyance.
Planning with Props: Wilbur does this with Carl, showing how he will get Lewis to restore his confidence in inventing, specifically repair the memory scanner, by getting Lewis to fix the time machine.
Ret Gone: near the end of the film. He turns out to be Lewis's son, and since Lewis gave the Bowler Hat Guy the directions he needed to work the time machine, reality was altered. Lewis never met Franny and so Wilbur was never born. Don't worry, he gets better.
Rousing Speech: Part of said plan is to give Lewis one of these, so he will fix the memory scanner. Turns out Wilbur is Lewis's future son.
Time Police: Initially pretends to be one of these to help Lewis stay alert for the Bowler Hat Guy.
Determinator: He's this with inventing stuff. His motto isn't "Keep Moving Forward" for nothing.
Henpecked Husband: He has shades of this with his wife. After all, she is always right.
Hot Scientist: He's pretty darn good looking, even with wearing a labcoat and his signature bowtie.
Self-Made Man: Thanks to the memory scanner, he was able to show what he could do, even owning his own company and building the inventions in them. Though having a scientist for an adopted mom probably helped matters.
Cool Uncles: Gaston and Art to Wilbur. Then, Fritz and Joe to Lewis and Wilbur; for the latter, they're his great uncles. They all went to help Lewis and Wilbur when the T-Rex appeared.
Gaston Framagucci, Wilbur's uncle, is an intergalactic pizza man.
Art Framagucci, Wilbur's uncle, built the meatball cannon.
Cool Pets: Their butler named Lefty is an octopus. They have a dog that wears glasses. Eventually, they take in a T-Rex, named Tiny. And who can forget Frankie and the Singing Frogs!
False Teeth Tomfoolery: When Lewis first meets Grandpa Bud, he is hunting for his false teeth, in quintessential Robinson style.
Fiery Redhead: Petunia, her "daughter" Tallulah, and her "son" Laszlo. They show their fiery nature when Petunia's children were arguing while painting the house. A few minutes later, Petunia slaps her husband.
Genki Girls: All of the female Robinsons have this eccentricity
Henpecked Husband: Uncle Fritz. Aunt Petunia berates and smacks him around...which is strange since she looks like just a hand puppet.