Hydreigon in RumbleHydreigon Dex Entry | Rumble Game EntryPokemon locationsCOMMENTS DARKRAI888 on Sun 24 Apr 2011 19:30:44 UTC. B.E.A.S.T=Hydreigon. Meowstic Royalty on Fri 26 Jul 2013 21:55:12 UTC. HYDREIGON: The only pseudo legendary to have Sp. Atk as it's best stat.Post Your Comments