With the new Pokemon movie, currently known as M18 or in Japan as 光輪の超魔神 フーパ (The Archdjinni of the Rings: Hoopa) will be released in Japan in July. However, the question that is on most peoples minds at the moment, is who is Hoopa and how will we get it in the game.
Currently hackers have been using the Pokemon Exploit trick to get Hoopa in their version of the game, and so we now know it's type, PokeDex entry and it's moves, here is what was returned.
Type: Psychic/Ghost. Pokedex entry: In its true form, it possess a huge amount of power. Legends of its avarice tell how it once carried of an entire castle to gain the treasures hidden within.
Though its current role in the movie is unknown, on certain Mirage Islands in Pokemon Omega Ruby and Alpha Sapphire, there are floating hoops. Perhaps this could be a direct link to what Ash will be doing in the new movie. Other details found by hackers, show that there is two forms of Hoopa. Hoopa Confined and Hoopa Unbound. Maybe we will be seeing an impressive new form for Hoopa. Other characters confirmed for M18 include a shiny Mega Rayquaza, which links directly to the storyline in the game, and at the end of M17, Primal Kyogre and Primal Groudon were shown.
Over all, Hoopa, the Mischief Pokemon is known to have many rings with each legendary in. Maybe the movie will reveal all the legendaries again. Perhaps Hoopa, is the gate way to every single legendary ever to be unlocked. Anyway for now, we will have to wait until the movie comes out to find out about Hoopa for now.
Edit: I have just found out that in Omega Ruby and Alpha Sapphire, there are six rings. However, there is also six visible rings on Hoopa's body, two on it's ears, one on it's forehead, two around the eyes and one around his body. Coincidence? I think not!