| The name of this article was obtained from production material.
While the name is technically official, a future episode can give the character a new name, which will then become the official name.
Jack's normal appearance since season 16
|Hair color||Brown (most episodes)|
Blond ("Citizen Frensky")
Beige (s10; s12)
Orange (s11; s16-present)
|Cartoon debut||"So Long, Spanky"|
Jack spoke in the episode "So Long, Spanky" where he was at the pet store that was going to feed the Boa Constrictor. He's been seen with Norman many times and it's possible they are best friends. He spoke again in "Best Wishes".
Jack Weasel is a weasel with a light gray complexion. He wears a yellow shirt with blue stripes, blue jeans, and green and white sneakers.
Jack originally wore a yellow shirt with a single red stripe in the middle, long brown jeans, and red and white sneakers. His skin color was slightly dark brown.
In the episode Buster's Special Delivery he is seen wearing a blue shirt with yellow stripes, and black jeans, and most likely the same green and white colored sneakers. He has a brown Mohawk and has whiskers. As a kindergartner he wore a blue shirt with a red spot in the middle, long khakis, and tanned shoes. He wears a yellow sweater during Autumn (or the Fall).
- Season 7
- D.W.'s Time Trouble 707a
- Season 8
- Bugged 803b
- Season 10
- Season 11
- Brain's Shocking Secret 110402
- Season 12
- Do You Believe in Magic? 120902
- Season 13
- Season 14
- Nicked by a Name 140301
- So Long, Spanky
- Buster's Sweet Success
- Citizen Frensky
- Dancing Fools
- War of the Worms
- I Wanna Hold Your Hand
- Prunella the Packrat
- Brain's Biggest Blunder
- Best Wishes
- This character's fur color and clothing colors have changed numerous times throughout the series.
- Jack is in the same fourth grade class as Prunella.