3rd Grade Male Dog

3rd Grade Male Dog is an unnamed third grader who made his debut in the episode "Arthur's Eyes". In the episode he was seen at lunch along with several other characters including the main characters themselves.

He is seen in the background of the episodes, but has been heard speaking in a few episodes such as "Arthur's Substitute Teacher Trouble".

He is also seen in "A" is for Angry carrying a camera and filming the chess match between Arthur and Brain. He may have some interest in videography--either that, or Muffy forced him to.

Physical appearance
3rd Grade Male Dog is a brown dog that wears a tan sweater, a yellow shirt underneath his sweater, long blue jeans, and orange and white colored sneakers. In "Germophobia" he wears tanned swimming trunks.

Trivia

 * This character is in Miss Sweetwater's class.
 * In Elwood City Turns 100!, he is seen reading in the background in the library, but Buster and Brain scare him off when they are arguing about the play whether the audience wanted fantasy or accuracy.
 * He is one of the few characters that has dots for eyes.
 * He plays the tuba in the Lakewood Elementary Band.