Butt Detective the Movie: Star and Moon

Koala hires Butt Detective to track down a missing relative who vanished during an idol competition. The investigation leads Butt Detective to Stardust Island, where the contest was held-and where the notorious crime group Phantom Thief Academy operates under the leadership of Phantom Thief G. The organization is secretly pushing forward with its "Dark Age Plan." To infiltrate the island, Butt Detective poses as an idol contestant. Along the way, he teams up with Phantom Thief U, who’s trying to reclaim the precious Moonlight Stone from Phantom Thief G.