You can't battle him. But if you go to Silph Co. after defeating Red, you might see him there.
unfortunately, no. At the present time, there is no way to battle the Hohenn Champion.
Steven Stone appears in the game, but you cannot battle him.
You can't battle Steven in Pokemon SoulSilver or HeartGold.
You have to have the Engnima stone.
Pewter Mueseum
Steven Stone wll give it to you if you pick the Green Stone.
In the silph co.
Steven Stone will give you a Beldum in exchange for a Forretress.
You don't use any specific Pokemon. You must have the enigma stone. You could have gotten the stone from a long ago event, which has since passed. With the enigma stone, you take it to Steven to be evaluated in a museum for fossil resurrection. Walk outside to battle latios.
You find him at the Pewter city meuseam.
Steven Stone is the most powerful trainer in Pokémon Emerald. He can be found in the upper area of Meteor Falls after defeating the Elite Four.
You can buy stone edge at the battle frontier TM stand.