Pokemon's First Appearance: Pokemon Red, Blue & Yellow

Pokemon's red-eyed, ghoulish creature is a nightmare to most of its opponents for a reason. Along with knowing a handful of Ghost attacks, Gengar can do Thunder, Fire, Grass, Fighting and Psychic attacks, too. Its base stat total (500) is good, and it's immune to Normal, Fighting and Ground attacks. However, similar to Misdreavus, Gengar is weak against Ghost and Dark attacks, and Psychic attacks, too. Regardless, Gengar is still a Pokemon worthy of being a part of your team.