Jack Weasel

4th Grade Male Rat is an unnamed fourth grader. He is seen mostly at both lunch and the hallways of Lakewood. He is most of the time used as a background or cameo character.

He spoke in the episode So Long, Spanky where at the pet store they were about to feed the Boa Constrictor. As for any friends he hangs out with third graders and fourth graders just like the main and minor characters.

He mostly hangs out with the 4th Grade Male Rat (Number 2). He is generally nice to the kids and is in the same fourth grade class as Prunella, although it's unknown if he is friends with her.

He was in the same kindergarten class as Prunella and most, if not all, of the other unnamed fourth graders that were in the kindergarten class.

Appearance
4th Grade Male Rat is a light gray rat that wears a yellow shirt with blue stripes, blue jeans, and green and white sneakers. He 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 also has short brown hair that runs from the top of his head all the way to the back of his neck.

Triva

 * This character's skin complexion has changed a lot throughout the series along with the color of his clothes.
 * This character appears to be friends with 4th Grade Male Rat (Number 2).