Eleking

Eleking (エレキング Erekingu) is an unreleased Pokémon supposedly revealed at Nintendo Space World 1997, where it was shown only by name in a promotional video for the Pokédex shown at the Gold/Silver movie area.

Further details regarding this Pokémon are unknown. Its name suggests that it may be a precursor of Elekid, or probably Electivire from Generation IV.