The main character of the series, a 4 (5 in season 2 through six, then six in season 7-8) year old little boy with a big imagination. An imaginative Bobby claims however that he came from a magical place called "Bobbyland" where he ruled everything.
- Annoying Younger Sibling: To Derek and Kelly.
- Bare Your Midriff: His rare male example.
- Berserk Button: His last name is spelled "Generic" but is pronounced "Jen-Err-Rick" He'll correct you with annoyance.
- Catchphrase: "Am I in trouble?"
- Mr. Imagination
- Wise Beyond Their Years: He has his moments where he learns much more than even his two older siblings.
- Good Parents
- Go to Your Room!: Uses this if any of his kids do anything wrong.
- Grounded Forever: Used this on Bobby after ruining Kelly's sweet sixteen party.
- House Husband
- Ink-Suit Actor: Is basically an animated version of Howie Mandel when he had hair. In-universe, he may actually BE Howie Mandel, as a few episodes of the first season had the live action Howie transform into the animated Howard on screen.
- You Are Grounded: Also uses this as well, but in the episode "Back to the Furniture" he gives Bobby a triple punishment after his grandma's antique table that he has worked on for 3 weeks was ruined by Bobby from playing around with styrofoam bags with his friends and getting the foam all over it.
- Good Parents
- Longest Pregnancy Ever: While presumably not in-universe, she was pregant with the twins starting in the first episode of the second season which aired in late 1991, and doesn't give birth to them until nearing the end of the third season, over a year later.
- Verbal Tic: Martha frequently has phrases like "gee golly", "gee darn", "Fer corn sakes", and "Fer cryin' in the mud" in her sentences and ends some of them with "don'tcha know?" or "there, now, then, yet", owing to her Midwestern roots.
Bobby's 14-year old sister
Bobby's 10-year-old brother
- Annoying Younger Sibling: To Kelly, at times.
- Big Brother Bully: To Bobby at times.
- Deadpan Snarker: He has a sarcastic streak, especially around Bobby.
- Delinquent Hair: Has a rat-tail hairdo to match his personality.
- Freudian Excuse: His bullying towards Bobby stems from the fact that he was insulted by his own peers.
- Jerkass: Calls Bobby names like "dork" and "dweeb", ditched him a few times, humiliates him, and regularly tries to scare him.
- Kickthe Dog: Shown to ditch Bobby and leaving him alone in the wilderness in "Swim By Me", ditched him to go to the movies "The Big Sweep", and Bobby mentions it in "Bad News Bobby".
- Pet the Dog: There are rare times where Derek was this to Bobby, like in "Adventures in Bobby Sitting", , "Beach Blanket Bobby" along with the family spending time with each other, and "Cruisin' Bobby".
- Subverted in "Hooked on Caps" where he becomes Bobby's manager after Bobby unintentionally wins the game, but after Bobby steals Derek's caps and loses them in a game with his friends, and confesses to him he started to tease him around again by taking his yo-yo.
- Vocal Evolution: Was voiced by a child actor Kevin Michaels for most of the series, then towards the end of 6th season was replaced by Pamela Segall.
The Generic's dog.
Bobby's uncle and Martha's older brother.
- Affectionate Gesture to the Head: A running gag has him give noogies to Bobby in each appearance he makes.
- Catchphrase: "It's time for noogies!"
- Intergenerational Friendship: His relationship with Bobby.
- Manchild: He is a bit immature for his age, especially compared to his sisters and his brother-in-law, which draws him closer to Bobby.
Bobby's aunt and Martha and Ted's older sister.
Bobby's neighbor and best friend who has a huge crush on him. She was introduced in season 2.
- Girls Have Cooties: Even after he was told that they don't exist, this is one of the reasons why Bobby hates when Jackie kisses him.
- Rapunzel Hair: She has two very long pigtails that reach the floor.
- Self-Proclaimed Love Interest: Claims that Bobby is her boyfriend, much to his disgust.
- Wise Beyond Their Years: Even moreso than Bobby, as later seasons have her try to help him or teach him a lesson.
- Vocal Evolution: She started off sounding genuinely like a cheerful yet ditzy little girl with a slight monotone to her voice. By the next season, the monotone completely took over and became how she speaks normally, unless she's excited, angered, or upset. It gets slightly deeper as the series progresses.