| 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.
Lisa's unknown relative (unknown family relationship)
|Cartoon debut||"Arthur's Eyes"|
John was in the same kindergarten class as Prunella and Brain. Sometimes he is substituted for Steve. While he is not related to Steve or Steve's sister Maria, he is most likely friends with both of them.
John is a rabbit with a white complexion. He wears a tan collar shirt with long sleeves, dark cream colored khakis, has on red suspenders, and cream colored shoes.
John also wears glasses shaped like half-circles. He has a blue backpack. In The Blizzard, his winter attire consists of a chestnut brown coat and a blue scarf. As a kindergartner, he wore a dark blue sweater, long gray jeans, and dark blue shoes. He also used to have longer hair as a kindergartner.
- Arthur - It's Only Rock 'n' Roll
- 101a. Arthur's Eyes
- 101b. Francine's Bad Hair Day
- 128a. I'm a Poet
- 502a. Kids are from Earth, Parents are from Pluto
- 508b. Bitzi's Beau
- 606a. Citizen Frensky
- 803b. Bugged (Partially seen in front of Helen in Brain's dream)
- 804a. Fernkenstein's Monster
- 805a. Vomitrocious
- 901b. Tipping the Scales
- 903a. Arthur Weighs In
- 907b. A is for Angry
- 1002b. Fern and Persimmony Glitchet
- 1007b. D.W., Bossy Boots
- 1010a. What's Cooking?
- 1104b. Brain's Shocking Secret
- 1108b. Buster Gets Real
- 1209b. Do You Believe in Magic?
- 1410b. The Long Road Home
- 150701 Prunella the Packrat
- 1708b. Crime and Consequences
- 2001a. Buster's Second Chance
- Sometimes this character replaces Unknown Male Rabbit in some episodes like Cents-Less where he was seen in one scene and then the scene changed completely with a new character. He also replaces Steve at times in some episodes as in earlier episodes he was seen talking with Maria.
- John's name has appeared on lists a couple more times in some episodes.
- His name can be seen on the clipboard when George is asking for sponsors in The Long Road Home.