Norman Hedgehog

4th Grade Male Rat is an unnamed character who made his first appearance in the episode Arthur and the Crunch Cereal Contest. He is mostly seen either at lunch or in the hallways of Lakewood. Very little is known about this character although he has had one speaking role out of the whole series, which was in the episode Arthur and the Crunch Cereal Contest.

It's possible he might be a fourth grader since it could be him that's in the picture seen in the episode Brain's Shocking Secret. He is mostly a background character and is kind to the other kids at the school.

Appearance
4th Grade Male Rat is a rat with a gray complexion. He wears a light yellow collared shirt with long sleeves, long blue jeans, and orange sneakers with white stripes. He has an Afro with his hair color being brown. He also has been seeing riding a red skateboard. In the episode, Brain's Shocking Secret he was seen as a kindergartner in the picture. His appearance as a kindergartner has changed very little other then the yellow shirt that he was wearing as a kindergartner had a blue collar and he wore white shoes.

Trivia

 * 3rd Grade Male Rat maybe his younger brother who is a third grader.