Bootleg Games

Bootleg games are games that imitate other franchises and are sold illegally. Many bootlegs can actually be quite hard to find, and are usually distributed over the internet, in flea markets, and other places where you generally can't trust what you're getting.

In Creepypastas
Many creepypastas tell stories of disturbing bootlegged games, that contain some strange (and disturbing) oddity, scene, or other part of the game that is not in regular copies of the game. Some tales of bootlegs are even about games that, as far as anyone knows, do not exist.

One example of a bootleg creepypasta would be the infamous Pokemon Creepy Black.