Superstar Strikers: Mushroom Saga (Part 2)

Based on The Super Mario Bros. Movie (2023). A Super Mario x Sonic the Hedgehog x Splatoon crossover.

Months after settling in Inkopolis, Sonic is eager to prove that he has what it takes to be a true hero, and now that Astrid decided to stay in Inkopolis with him, she decided to do the same since she declined application to the Splatsville Academy. But who would've thought that their heroism would come to the ultimate test when they find a mysterious pipe that takes them to a whole new world, The Mushroom Kingdom.

There, they will meet a plumber from Brooklyn named Mario, who also got transported there and is looking for his younger brother, Luigi, who got separated into the Dark Lands. Mario, Sonic and Astrid will now have to team up together to become the greatest hero's as they will meet Princess Peach, Toad, and others and go on a crazy adventure across the Mushroom Kingdom to stop the King of the Koopas, Bowser, from taking over the world with the rare Power-Up, the Superstar.