There was once a human Petunia married to Fritz.Never, in a billion years, could a puppet give birth. The real Petunia died sometime before Wilbur's birth, and Fritz replaced her with a puppet.
Lewis' mother was a teenager.She had a rather conservative father, and was not supposed to be seeing any boy at all, let alone sleeping with her boyfriend. But she got unlucky. Although she managed to Hide Her Pregnancy (can't have been easy—she looked pretty slender), she and her boyfriend knew they had to do something with the baby. They did research into safe haven laws, found out that the orphanage was an appropriate place, and left him there. She was just young enough to think the whole Doorstop Baby scenario—in the rain—might fit, and she couldn't risk being noticed by someone who might try to talk with her father.
Frankie the talking frog has a good friend named Jeremiah.He is a bullfrog, and nobody understands a single word he says, but always had some mighty fine wine.
A prankster from the Robinson family is responsible for Michigan J. Frog.One of Franny's singing frogs + time machine + strict instructions on when to sing and when to act just like a regular frog = Generations of Hilarity Ensues. At least from the prankster's (possibly Wilbur) point of view.
There are no temporal paradoxes.The original timeline was created without time travel. When time travel is used and Lewis sees his future inventions, the timeline falls back on itself.
The Time Continuum Task Force, or something like it, becomes a reality sometime after the events of the film (in the future).Cornelius' time machines are commercialized, but strict regulations must be placed on their use due to the possibility of abuse and/or inadvertently altering the timeline for the worse (as we know from the movie, changing the past with time travel is an easy thing). The government of the future sets up a real Time Police department. Wilbur actually ends up joining them, making his initial self-introduction to Lewis partly true From a Certain Point of View.
The movie is set in the same universe as Power Rangers.And strengthening the above theory, the Time Continuum Task Force could be the "extended" name of the Time Force Police.
There is more than one Tom Selleck.Specifically, there is a Tom Selleck in the future who resembles Lewis. He was the one Wilbur was referring to, assuming Lewis would know who he was.
Lewis's mother was a "lady of the evening"My husband and I both just watched this for the second or third time, and noticed his mom is dropping him off in red high heels. Or they look like red high heels. Dropping a newborn off in the middle of the night, completely covered up, and extremely nervous, plus the inappropiate shoeware for a watery ninja baby drop....
Lewis's mother is ... his wife!And he's his own grandfather. Some time after the events of the film, Franny and Cornelius have another baby but can't keep it for some reason. Franny says she's going to put it up for adoption and Cornelius goes along with it, since he was adopted and turned out pretty well. Franny decides she could never live with wondering if some child walking down the street was the child she gave up. She reasons that if she brings the child to the past, he'll be an adult by the time she encounters him after having made the decision and it'll be easier then, so she secretly borrows one of the machines. Knowing the approximate time Cornelius was adopted (but not which orphanage he came from), she reasons there's a better chance of the baby getting adopted at that point, travels back to then and chooses what looks like the best (or at least, most convenient- it is raining, after all) orphange she can find. All this from the fact that the studio used Franny's basic character model and put a cloak on it to create Lewis's mom.
The movie takes place in the same universe as Astro Boy.However, Astro Boy takes place decades, or even a century or two, later. In this time, the time machines Cornelius invented were destroyed in some manner, and his company gets a name change through financial takeover or gets overshadowed by another company headed by a brilliant Gadgeteer Genius.
Wilbur is the real Captain Time TravelWilbur wears a black tee-shirt with the lightning-on-blue-circle emblem of Captain Time Travel. That superhero was on the lunchbox that Lewis used to house his brain scanner controls. Why would a rebellious teenager wear a shirt inspired by a character that was popular in his father's youth? Perhaps when Wilbur grew up he was allowed to use the time machine, and he went back to the old days to become a superhero for a while.
Fran is Buds granddaughter.Both their families have an apparently genetic cowlick, and Fran has siblings eliminating the possibility that she is his daughter.