Origin Steelix

The Sand Demon Pokemon

ground, ghost

When frustration, agitation, and revenge reach their peak, an Onix will evolve into a Steelix - but only after midnight, the witching hour. They love to trick unwary passersby into dark areas where they create creepy shapes with their bodies to scare them. They do nothing more than laugh, however, as people and Pokémon run away in terror.