Dream Spacewalk

Dream Spacewalk is a dream event in Mario & Sonic at the London 2012 Olympic Games. It takes place in the Sky Station Galaxy (named Syncro Battle Galaxy in the event) from Super Mario Galaxy 2.

Story
A group of Lumas are seen on a planet. The camera then pans over to Dino Piranha, who spots the Lumas. He spits out fireballs and the Lumas flee. They fly over to the players, asking for their help to defeat Dino Piranha. They turn into Launch Stars and the event begins.

Gameplay
The event focuses on defeating Dino Piranha. Players must maneuver into rings, solo or as a team, and once the ring is fully charged, they launch themselves into Dino Piranha, spin attacking it. After a few hits, Dino Piranha will turn orange and spit fireballs. Players can spin attack them.

Trivia

 * Strangely, planets from the Good Egg Galaxy and Gateway Galaxy are seen. This is likely the reason for the name change to Syncro Battle Galaxy.