10 Otherworldly Video Game Enemies That Were Once Human

10. Gengar - Pokémon Mystery Dungeon: Blue Rescue Team And Red Rescue Team (2006)

Even the most lighthearted entry on this list isn't without a deliciously dark twist - the kind the Pokémon Mystery Dungeon series is known for.

The player, a human that has turned into a Pokémon, is constantly goaded, inconvenienced, and eventually hunted down by Gengar and his client-swindling rescue team, Team Meanies. An unnatural 'imbalance' threatens the future of the entire Pokémon world, and Gengar is quick to come to the conclusion that this balance can be restored by getting rid of the human amongst them - i.e. you.

Forced to go on the run, not only does your rescue team disprove this theory (it's actually a meteor causing the imbalance), but you also uncover something very shocking about one of your pursuers.

Long ago, a cruel human boy touched the tail of a Ninetales, a fate that brings about a terrible curse. His Pokémon, a Gardevoir, selflessly chose to bear the curse in his place, and, instead of helping her, the boy fled without looking back. As punishment, he was turned into a Pokémon.

Gengar is that Pokémon.

The game's fascinating epilogue focusses on Gengar's attempts to rediscover his past life, the player helping him all the way despite how he treated them during the main story.