Pokemon XY: Odemashi Ko Majin Hoopa
Pokemon: Hoopa
ポケモン・ザ・ムービーXY『おでまし小魔神フーパ』
An anime short for the Pokemon XY series. It is available in Japan along with the purchasing of a ticket for Hoopa and the Clash of Ages movie, which this short ties into.
(Source: Bulbapedia)