"Alan continues his journey to master Mega Evolution and stand on the top as the strongest. Together with Steven, he pursues the legendary megalith that disappeared together with Mega Rayquaza. During this search, he receives information that Groudon has suddenly appeared in the sea. Alan and the others hurry to the location in question, where not only Groudon appears before them, but Kyogre as well. Furthermore, Rayquaza descends from the heavens and a grand battle between the legendary trio begins! What will this mean for Hoenn's future!? Will Alan and the others even survive this!?"