Frigate Skullian (アステロイドスペースクラフト Asuteroido Supēsukurafuto?, lit. "Asteroid Spacecraft") (commonly shortened to Skullian) is the boss of Asteroid Coaster in Sonic Colors. It is similar to Frigate Orcan from Starlight Carnival but is more heavily upgraded. This boss differs from its predecessor by having a red and black color scheme, and several new abilities. In the DS version it's smaller than the Frigate Orcan due to the fact that it carries boxes. It also has a huge yellow weak spot because of the different Sonic Rush/Sonic Rush Adventure gameplay features found in the DS version of Sonic Colors.