While Nintendo published the game in Japan like it did its predecessor, Ubisoft took publishing duties for South Korea, Hong Kong, and Taiwan over from Nintendo. On March 2, 2023, a demo was added to the Nintendo eShop.

Also similar to its predecessor, the game was leaked ahead of its official announcement, on Nintendo's official website hours prior to the Ubisoft Forward 2021 broadcast. The game's story revolves around the cast venturing through space and traveling to different planets to rescue the Sparks. The game contains nine playable characters with a team of three allies like its predecessor. Like its predecessor, the game is a crossover featuring characters from the Super Mario franchise and Ubisoft's Rabbids series, and sees the return of characters from the previous game in addition to introducing new ones such as Rabbid versions of Rosalina and Lumas named Sparks. It is the second game in the Mario + Rabbids series, and the sequel to Mario + Rabbids Kingdom Battle. Mario + Rabbids Sparks of Hope is a Nintendo Switch game released on October 20, 2022.

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