Pokémon: Hoopa's Surprise Ring Adventures is a special anime that premiered in spring 2015, produced by OLM.

About the production: the story comes from a video game, there are 6 episodes of about 1 minutes and its current status is "finished".

Its main genres are comedy and fantasy.

On AniList, Pokémon: Hoopa's Surprise Ring Adventures has an average score of 54%, an average score, and appears on 1,219 users' lists.

The franchise continues in or follows from: Pokémon The Movie XY: Ring no Chou Majin Hoopa.

A series of six anime shorts for the XY series, leading up to the release of Hoopa and the Clash of Ages. They star Ash Ketchum and his Pikachu as they deal with trouble started by the Mythical Pokémon Hoopa. The shorts originally aired weekly on Oha Suta from April 23, 2015 to May 28, 2015. English versions of all six shorts were available on Pokémon.com starting on December 11, 2015. (Source: Bulbapedia)

Official synopsis from AniList.