Knuckle Joe arrives on Popstar badly hurt and Sword Knight and Blade Knight hand him to Tiff and Kirby. When Knuckle Joe wakes up in bandages, he finds his medallion that his father gave him gone. He tells Tiff and Kirby that NightMare Enterprise's strongest monster Masher is back...rebuilt and upgraded to Masher 2.0. When Masher 2.0 arrives on Popstar with his revenge on Knuckle Joe, Knuckle Joe heads out to fight Masher 2.0 with Tiff, Kirby, Sword Knight, and Blade Knight not far behind.
Meanwhile, Tuff, Fololo and Falala, and Metaknight work hard to reclaim Knuckle Joe's medallion from King Dedede as well as a device that'll help Knuckle Joe defeat Masher 2.0.
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