SM017: Crystal-Clear Sleuthing!

- (アローラ探偵ロトム!消えたクリスタルの謎!!) is the 17th episode of Pokémon the Series: Sun & Moon.

Synopsis
When Ash arrives at the Pokémon School, he notices that his Electrium Z has gone missing. Rotom approaches the panicking Ash, offering to help search for it. Rotom is crazy about crime shows and says it wants to solve a mystery just like a detective would.