Mario is invited to Princess Peach's castle, and on his way notices a strange light in the grass. As he peers cautiously through the reeds, he sees a small, lost Luma. With the baby Luma tucked safely under his cap, Mario rushes on to the castle. But when he gets there, something unexpected is waiting for him... Collect stars as Mario travels from galaxy to galaxy, working through various levels—sometimes upside-down, sometimes floating from place to place. Mario can also team up with his dinos...