Killer Clown

The Killer Clown was an unseen character in the episode "The Milf, the Mime and the Maniac".

History
When Ash and Pikachu got lost in the forest, they eventually came across a killer clown who chased them. Details of this encounter are very limited as Ash only mentions outrunning the clown.

Shortly after, a flashback depicting Ash and Pikachu running in fear over clown horn honking is seen.

Trivia

 * This character is a reference to the 2016 "Killer Clown encounters" which became a cultural phenomenon and craze.
 * It is not known if the clown was someone pulling a prank on or if they had homicidal intentions toward Ash and Pikachu.