Taken from this past Famitsu magazine:

Within an Ancient Globe (an old, giant globe exhibited at a museum), there is another world called Yuretopia (translator: “yure” = tremor/shaking). Yuretopia’s peace is shattered by the marauding pirate Shay King (translator: whatever). Queen Melfull and her Melfull subjects are imprisoned. Not only that, Shay King claims the legendary treasure “Deldel Purse,” which spits out coins whenever it is shaken. Captain Maple Syrup, the female pirate, observes Yuretopia’s crisis from the outside world. Setting her eyes on the legendary treasure but with no desire of doing the dirty work herself, she steals the Ancient Globe and sends it to Wario. True to form, Wario prepares to raid the beleaguered kingdom when Queen Melfull escapes to the outside world in hopes of finding help. Beseeched by the Queen to become a hero to the kingdom, Wario sets off to Yuretopia where the promise of vast treasures beckons.