This was taken from TVTome, a very reliable source and the one I always use for anything to do with the anime. Unfortunately, I can't find the page, because the site is a little on the fritz right now, but here's the article copied from another site: "Deep in the Honen league lives a android Pokémon by the name of Lucario. Mew is setting out to find the legendary kingdom, The Kingdom Illusions. Instead, Mew is locked in a diffent section of the Hoenn league, a entirely new place. The castle is called "The Wave-Guiding Castle" (thus the Wave-Guiding Hero). Ash & co. get caught in a new tangled mess when May's Skitty runs off: it senses a stong presence nearby and is very scared. The Mew and Ash meet up together and it's a whole new adventure when Lucario is released from is cage. Not only that, but the Wave-Guiding Hero is released from its slumber and attacks. This movie is to have a Threatrical Release and a new short that does not star Pikachu." I wonder if this theatrical release is for outside Japan? Because the site is definitely not talking about the Japanese version, as it gives it a 2006 release date.