Gastly is a pokémon of ghost poison type, that can evolve into Haunter and into Gengar further on. Gastly pokemon looks like a ghost sphere with a dark head surrounded by the mysterious purple gas. On its large sphere head, Gastly has two large white eyes and a big red mouth, and two small fangs. Gastly hunts by surrounding his prey in its poisonous gas that causes it to faint or using it immobilizing lick on the prey. Its gas form helps Gastly to slip into any place it wants making it hard to stop and get away from. But Gastly also suffers from the strong wind as its body just dwindles. It can also make itself invisible and creep on its enemies undetected. A fanart Pokémon progress bar for YouTube with Gastly.