You need to find both legendary Pokemon's. (Groudon and Kyogre) After that you shall go to Sootopolis and talk with Steven. He will guide you. As the last thing, you gotta find Rayquaza which is in the Sky Pillar in route 114 (not sure). He will stop Groudon and Kyogre from fighting. Then I think you can go into the gym.
Emerald: He is the champion of the Elite Four; Juan is the Sootopolis gym leader. Sapphire/Ruby: He is the gym leader of Sootopolis.
He is the sootopolis city gym leader.
In Sootopolis City.Trainers and Gym Leader uses Water-Type Pokemon.
In Pokemon Ruby, Wallace is the gym leader of Sootopolis City. When the player first arrives in the city, Wallace is not at the gym. He and Steven are north of the city. They take the player to the Cave of Origin where Groudon is encountered. After this battle, Wallace can be found and battled in the Sootopolis Gym.
Did you set it on Wombo?
Wallace is the Gym Leader of Sootopolis City so you will be able to verse him once you challenge the Gym.
you have to break all of the tiles and stairs will appear
sootopolis city, after u awake rayquaza. the gym leader is juan, changed from ruby/Sapphire Wallace
You must first go through the cave of origin.
where just about always is,the sootopolis gym.
you dive to get to sootopolis which is in the south east from mosdeep then fight groudon then you can challenge the gym leader and get your 8th gym badge. then u challenge the elite 4.
in sootopolis