Question: how to get houndoom mega stone in pokemon x?
Answer: Mega Houndoom: You can find this stone, Houndoomite, in Route 16 during the post-game. It is Pokémon Y exclusive. Mega Tyranitar: You can find this stone, Tyranitarite, in the Cyllage Gym during the post-game. It is Pokémon X exclusive.