Pokémon Ranger
Haunter was introduced in "Pokémon Red" and "Blue", where it appears in the Pokémon Tower, a memorial for dead Pokémon, once the player has obtained the "Silph Scope" item. It later appeared in all subsequent sequels, able to be captured in all except "Pokémon Ruby" and "Sapphire" and "Pokémon Black" and "White". Within these games, Haunter also appears as a Pokémon used by enemy NPC trainers, such as "channeler" enemies in the Pokémon Tower or Ecruteak City Gym Leader Morty in "Pokémon Gold" and "Silver". The character has also appeared in related spinoff titles, including "Pokémon Snap", the "Pokémon Mystery Dungeon" games, the "Pokémon Ranger" games, "" and "Pokémon Go".