Rabbid Mario is a Rabbid dressed as Mario , and one of the eight main playable heroes in Mario + Rabbids Kingdom Battle. He was created when Spawny used the SupaMerge to fuse a Rabbid with a Mario Cap. In Mario + Rabbids Kingdom Battle, Rabbid Mario teams up with Mario, Luigi, Princess Peach, Yoshi, Rabbid Luigi, Rabbid Peach, and Rabbid Yoshi to save the Mushroom Kingdom from Rabbid-fused enemies and Bowser Jr.'s attempted takeover.
Aside from the beginning cutscene detailing his creation, Rabbid Mario is first found frozen in Sherbet Desert. With Toad's help, he is thawed after the battle with Blizzy and Sandy, joining the crew on their adventure.