He appears after the Trainer defeats Mauville City Gym Leader Wattson to activate the Latios/Latias event.He can also be teamed up with to play through the Double Battle section of the Battle Resort.
He does not like to brag, and is generally a quiet and solitary person.Steven is also wise, knowledgeable, and very kind and generous.Steven Stone is a young man who enjoys collecting and valuing various rocks and stones around the world.He is very humble and down-to-earth despite his extraordinary Pokémon battling skills.Steven wears skinny black pants and black shoes with low heels, as well as metallic jewellery on both of his sleeves and his index and ring fingers.
He has a pin on his jacket, called the Mega Stickpin, which he uses to Mega Evolve his Metagross.
He will always use the same two Pokémon when teamed up with.
Steven also teams up with the player in various battles in the game, including the battle in the Mossdeep Space Center in the Delta Episode.
In the games, he will give the player various helpful tips and items. Stone, the creator of the PokéNav and the President of the Devon Corporation.
Like Cynthia in the Generation IV games, Steven is found throughout the game, giving items and tips to the player throughout the game.
He can also be found inside the Pewter Museum related to the Legendary Pokémon Latios/Latias event.