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Banana Lagoon is the first world in the Donkey Kong Adventure mode of Mario + Rabbids Kingdom Battle. It is a sandy beach area consisting of many palm trees, sand, tidal waves, and several sand structures. The music played in the overworld is a remix of DK Isles from Donkey Kong 64.
Rabbid Peach first arrives in the Banana Lagoon just as Donkey Kong and Rabbid Cranky arrive. They venture through the tropical area to find the missing Time Washing Machine parts before they reach a temple which requires two keys to open. Donkey Kong and co. then travel throughout the main area of the Banana Lagoon, eventually reaching Side Eye. After defeating Side Eye and acquiring the first key, Beep-0 reports that the second key is in the Reef, thus revealing their next destination.