He is obsessed with capturing a weasel that lives in the school, and frequently helps Ned, Cookie, and Moze with crazy activities.
If there is a big mess to clean up, Gordy always gives the excuse "Eh, I'll let the night guy get it." At one point he hires an assistant named Jackie who nearly usurps his position as janitor.
It's revealed that he has an operatic singing voice in the episode "Electives"; in the episode "Valentine's Day," he is in love with the Huge Crew.
Martin Qwerly (Tylor Chase) is another geeky friend of Ned, Cookie, and Moze.
His name is a parody of Billy Loomis, one of the Ghostface Killers from the film Scream.
Jerry Crony (Teo Olivares) is one of Loomer's friends, who aids him in bullying, with a penchant for fashion design that he tries to deny whenever he is seen sewing.
Even though he did not like her in the first and second season (she had a nasal issue), he falls for Lisa Zemo after she has a complete makeover in season 3; in some episodes in the third season, he tries to get her to go out for pizza with him, which never works because she has lots of guys to date until the last episode, when he finally gets to take Lisa out on a date. Bullock) is the Life Science teacher, as well as being in charge of the Sewing Club.
His friends are Ned and Moze, he appears in all 55 episodes of the series. He is also the extremely skilled boys' basketball coach. Monroe appears mostly in the first and second season, followed by an absence for a large portion of seasons 2 and 3, he returns in "Guide to: School Newspaper," saying that he was "living with the penguins" for a year.
She was Ned's dream girl since she was eight; in the series finale, she hopes at first that she and Ned will be together, but then decides to date Loomer after seeing his change.
Billy Loomer (Kyle Swann), usually referred to simply as Loomer, is the leader of a trio of bullies at Polk Middle School and the show's main antagonist.
Suzie Crabgrass (Christian Serratos) is Ned's crush and Moze's rival at every sport, but she becomes her best friend.
Having ended up dating Billy Loomer for a short time at the beginning of Season 2, in Season 3 she has a crush on Ned, and they start dating in the episode "Stress and Popularity", she leaves in season 3 but comes back in "Tests & When You Like Someone That Is Going Out With Someone Else".
She is a very good student, who most teachers trust, until the episode "The New Kid and Substitute Teachers" when she becomes a bad student around substitute teachers; in the next episode, however, it is forgotten about and she goes back to being a good student.