Diancie had an amazing mega but also wasn't the most interesting of Mythical Pokemon. Hoopa, on the other hand, is an exception. Hoopa was interesting when it was released back in Generation 6 ...

Collection of movies released as part of the Pokémon: XY anime series.

Hoopa and the Clash of Ages. A power unbound, a battle of legends. We’re sorry, the information you’re looking for isn’t available right now.

Pokemon Scarlet and Violet is adding Deoxys, Keldeo, and Zarude, but there's a pretty big catch if you want them.