MarioWiki
MarioWiki

The Star Spin is an ability in Super Mario Galaxy and Super Mario Galaxy 2 that allows Mario to spin. Star Spinning near enemies will stun or defeat them depending on the enemy. Star Spinning while in a Launch Star or a Sling Star will send Mario flying. Star Spining can also break certain objects like rocks and crates. Mario learns to Star Spin after Rosalina gave Luma in his possessions. Rosalina herself uses the Star spin in Super Mario 3D World. It is also used to activate special powers if you have a certain power-ups. If you have a Bee Mushroom while you star spin, the normal sparkle effects will be replaced with hunny. If you jump, star spin, and then Ground Pound, the somersault you do in the air before ground pounding will be at a slight tilt, and Mario will land with a bow.