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. A fanart Pokémon progress bar for YouTube with Gastly.
You still do not have Custom Progress bar for Youtube?
Install it from the official Chrome Web Store