Pickles

Pickles is a clown who is allergic to dogs and wears green clown clothes. In the episode "Arthur the Unfunny," he gives Arthur clowning lessons. He first appeared in the episode "Arthur and the Real Mr. Ratburn" as a cameo character. He has been seen again in the background throughout the series.

Arthur

 * 10201 Arthur and the Real Mr. Ratburn (cameo)
 * 21302 Arthur the Unfunny
 * 22001 How the Cookie Crumbles (cameo)
 * 40202 Muffy's New Best Friend
 * 40801 1001 Dads
 * 90201 Francine's Big Top Trouble (cameo)
 * 150802 Through the Looking Glasses (cameo in fantasy)