Dowster has the highest base Special Attack stat of all Ghost-type Pokémon and all Psychic-type Pokémon. It also has the highest base Attack stat of all Psychic-type Pokémon.
Dowster appears in the game's opening cinematic, replacing Gengar.
Dowster's pokedex entry and typing may reference a Japanese game known as Mother, Earthbound Beginnings or Earthbound Zero.
Dowster is based on the traditional image of a poltergeist, as suggested by its Psychic typing and ESP-like abilities. It also bears a resemblance to the official Pokémon Haunter. Its shiny form resembles Chanolour, referencing a popular fan theory that Gengar is the shadow of the Pokémon Clefable.
Dowster may be a combination of demon, shadow, monster, and/or master.