He has a habit of imagining things, often at times thinking up TV ads for concepts he has just been introduced to (a trait likely inherited from his father as that is his career).
Some of his best-known escapades in the series include throwing temper tantrums (most notably at the shoe store), finger-painting with mashed potatoes at a diner, scribbling all over Peter's transportation committee poster, and ultimately, swallowing Peter's small pet turtle.
In Double Fudge, when the Fargos move downtown, the Hatchers learn she can't pronounce "sh" yet.
Howie seems to have some slightly rude behavior, as he calls Warren "Tubby" even though he's lost some weight since, and a rather crazy driver when it comes to golf carts, and easily gets frustrated.
They do seem to be somewhat spoiled, and usually beg and plead to get their way, while Eudora manages to present the case carefully to Howie.
He is in the same grade as Peter and slightly older than he is, assuming that he celebrated his tenth birthday in the first book, and taller than Sheila.
Frank gets remarried to Beverly Muldour, an art dealer and neighbor of the Hatchers from their time in Princeton, New Jersey.
There may be some chances of Sheila and Peter showing slight affections towards each other throughout the series, and it is obvious[citation needed] she has a small crush on him.
In the third book, Mrs. Hatcher hires Libby to help watch after Fudge when the demands of a baby and other parenting responsibilities get to be too much for her to handle at once.
They are best buds until a game of slam book where they start fighting with Bobby Egran's models with the Van Arden twins, Sondra and Jane.
Once, though, after delivering his "tough-guy" line, Elaine, an acquaintance of Peter, agreed to "make something of it" and (playfully) challenged him to fight.
He is a fussy eater; he constantly mentions that he does not like onions, lima beans, peas, Oreo cookies or bread crusts, and only drinks chocolate milk.
However, Peter's enthusiasm is somewhat tempered when Big Apfel says he has aged since his Red Sox days and takes a more relaxed attitude to the community softball game, seeing it more as a friendly get-together as opposed to the intense Yankees–Red Sox rivalry Peter had read stories about.
When Peter's grandmother gets married in an outdoor wedding, Big Apfel attends in his Red Sox uniform and barbecues burgers for the guests.
In Double Fudge, he helps out with Uncle Feather's brief period of being unable to talk, and is then later promoted to superintendent of the building (which is also his job in the TV series) and converts the elevator to self-service.
He remembers all his regular customers including the Hatcher brothers and entertains them with comic antics and gives out candy.
When Peter and his class get assigned a geography report on New Jersey, Martha requests if she could give one instead on her home state of Minnesota.
Juicy-O is a mixed-fruit beverage—a combination of orange, pineapple, grapefruit, pear, and banana—which Peter and his dad found noxious-tasting, and was annoyed when Mr. Yarby sent a crate of it to the Hatcher residence after Warren wrote a TV commercial for the company.
Mr. & Mrs. Yarby realize that Fudge is rambunctious and remark on inappropriate deportment, irking Peter because he felt he was being respectful to adults.
When Peter says he lied about liking Juicy-O for the sake of manners, Warren reveals to his son that he himself found the stuff pretty disgusting.
She has a strict personality and refuses to call Fudge by his nickname, referring to him as Farley, infuriating him into kicking her in the shin and perching atop the classroom cabinets.
However, the person drawn ends up being Mr. Green, who is pleased by the results and asks Brian Tumkin to autograph the drawing so he can hang it in his office.
According to Judy Blume, he is based directly on a real person whom she met one summer when she was growing up, who did indeed own a bike shop.
Gorgeous teenage library assistant that Peter meets on holiday in Maine in Fudge-A-Mania, and develops a serious crush on.
Peter's infatuation with Isobel despite her being older and him having a brief fantasy of being stranded with her on an island while wearing loincloths mirrored the protagonist of another Judy Blume book, Tony Miglione and his crush on Lisa Hoober in Then Again, Maybe I Won't.
The friction dissolves when Sheila is upfront with Marty about her aquaphobia, and he develops a system to prepare her for her beginner's test.
A seventeen-year-old lifeguard at the Tarrytown community pool in Otherwise Known As Sheila The Great, and yet another young gentleman Libby Tubman finds appealing.
Paul and Allen approach her showing they solved the crossword and asking what their prize is, and she awards them editorship of the newspaper.
Despite having been successfully extracted from Fudge's stomach after he was given a combination of prune juice, castor oil and milk of magnesia, the turtle died of an unknown cause (though possibly due to being unable to survive the conditions of being in a human stomach), which Peter's doctor predicted would happen.
His parents want him to get something else, like a canary or parakeet, but Peter suggests a myna bird, which he mentions can talk, much to everyone else's regret.