Fan Casting Poipole's Partner in Pokemon Mystery Dungeon: Shattered Worlds

When Urshifu was young, he was a lonely and timid Pokemon with no friends—but that all changed when he met Poipole. She became his best friend and helped him come out of his shell, and he became so attached to her that he soon greatly feared losing her and things going back to what they were before. So when she was about to leave for her homeworld, he pulled her away from the portal in a fit of panic, not realizing that he had effectually stranded her in his world. He didn't realize the consequences of his actions until it was too late to make amends, and feels as though it's his duty to bring a stop to Naganadel as a result.