Haunter (Japanese: ゴースト Ghost) is a dual-type Ghost/Poison Pokémon introduced in Generation I.

It evolves from Gastly starting at level 25 and evolves into Gengar when traded, or when exposed to a Linking Cord (Pokémon Legends: Arceus).

Haunter is a purple Pokémon with a gaseous body. It has a round head flanked by three large, spiked protrusions on either side. It has triangular eyes with small pupils and a mouth with a long, pink tongue. The gases composing its head curve into its mouth to form several pointed teeth. Disembodied hands with three clawed fingers each float in front of its body. Its body tapers into a jagged tail. Haunter’s gaseous form makes it one of the lightest Pokémon in existence. It can also float through walls. It has been shown in the anime that it can control its hands from far away and can control any Pokémon that it touches with its hands.