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SM016 : They Might Not Be Giants!
Sun & Moon series
SM018 : A Seasoned Search!
Crystal-Clear Sleuthing!
SM017   EP956
Alola Detective Rotom! The Mystery of the Missing Crystal!!
First broadcast
Japan March 9, 2017
United States July 1, 2017
English themes
Opening Under The Alolan Sun
Japanese themes
Opening アローラ!!
Ending ポーズ
Animation Team Kato
Screenplay 松井亜弥 Aya Matsui
Storyboard 浅田裕二 Yūji Asada
Assistant director 渡辺正彦 Masahiko Watanabe
Animation directors 直井由紀 Yuki Naoi
夏目久仁彦 Kunihiko Natsume
No additional credits are available at this time.

Crystal-Clear Sleuthing! (Japanese: アローラ探偵ロトム!消えたクリスタルの謎!! Alola Detective Rotom! The Mystery of the Missing Crystal!!) is the 17th episode of the Sun & Moon series, and the 956th episode of the Pokémon anime. It first aired in Japan on March 9, 2017 and in the United States on July 1, 2017, as part of a three-hour special.

201 Spoiler warning: this article may contain major plot or ending details. 201


Professor Kukui and Rotom Dex are big fans of the TV show Alolan Detective Laki, and Rotom even has a blond wig so it can pretend to be the star. When Ash’s Electrium Z goes missing, Rotom excitedly takes the case!

Through video replay, Rotom tracks the Z-Crystal’s last known whereabouts to the schoolyard, where Ash and Kiawe were training. Rotom suspects Kiawe ended up with the crystal, but Lillie has another explanation: the video shows Ash putting it in his pocket. Ash remembers that he put the crystal on his nightstand before going to bed—and Pikachu triumphantly finds the missing Electrium Z caught in Rotom’s wig!


090Shellder.png This plot summary is incomplete.
Please feel free to edit this plot summary to add missing sections and complete it.

When Ash loses his Electrium Z, Rotom takes the chance to imitate the detective on its favorite TV show, with Pikachu assisting it on the case.

Major events

  • Rotom updates itself with a video camera function.
For a list of all major events in the anime, please see the timeline of events.



Pokémon debuts



Dare da?


Who's That Pokémon?

Who's That Pokémon?: Smeargle (US and international), Komala (Japan)



  • When Rotom asks Komala where the Electrium Z is, its first seen with its mouth open, but in the very next shot, its mouth is closed.

Dub edits

In other languages

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SM016 : They Might Not Be Giants!
Sun & Moon series
SM018 : A Seasoned Search!
Project Anime logo.png This episode article is part of Project Anime, a Bulbapedia project that covers all aspects of the Pokémon anime.