Science teacher Ryland Grace wakes up on a spaceship with no recollection of who he is or how he got there. As his memory returns, he begins to uncover his mission: solve the riddle of the mysterious substance causing the sun to die out. He must call on his scientific knowledge to save everything on Earth from extinction... but an unexpected friendship means he may not have to do it alone.

The Super Mario Galaxy Movie finds Mario and Luigi solving everyday problems in the Mushroom Kingdom with their "let's-a-go" attitude. They meet a new friend in Yoshi, try to reform a miniaturized Bowser, and eagerly look forward to Peach's birthday party. A call for help sends the crew across the galaxy to face new worlds, unexpected threats, and iconic characters like Rosalina and Bowser Jr.