with characters like Mario, Luigi, Princess Peach, Rabbid Peach, Rabbid Luigi, and more. They're on a "galactic journey to defeat a malevolent entity and save your Spark companions." The game's description adds: "Explore planets throughout the galaxy as you uncover mysterious secrets and compelling quests!"
Sparks are the name for new characters formed by Lumas and Rabbids fusing together. Mario and company are traveling the galaxy to save each planet, rescue these Sparks, and defeat the villainous Cursa.