Gastly

Psychic 40 HP Stage: Basic Common

N N

Will-O-Wisp

Swelling Spite

When this Pokémon is Knocked Out, search your deck for up to 2 Haunter and put them onto your Bench. Then, shuffle your deck.

It's said that gas emanating from a graveyard was possessed by the grievances of the deceased and thus became a Pokémon.