Diggas are enemies resembling drill-fronted Bullet Bill only appearing in Super Mario Galaxy 2. They are located in the Spin-Dig Galaxy. Diggas drill with their body exposed and move in set circular paths along the surface, ignoring Mario. Brand new Super Mario Galaxy 2 is a platforming video game developed by Nintendo for the Wii. It was first announced at E3 2009 and is the sequel to Super Mario Galaxy.