Pokémon S16E41 - Go, Go Gogoat!

As they're on a new island, Alexa starts to work on a new article which gives Ash a chance to learn about Gogoat, one of Alexa's Pokémon from the Kalos region. However, soon afterwards, a boy who lives in the island comes over to Gogoat and touches its horn. As Gogoat can read minds when interacting with his horn, he sees what the boy is thinking and runs off with him. Ash & Alexa go out to find Gogoat, to find that it has gone off to where the boy's father works. Why did the boy leave with Gogoat? Will Alexa get it back?