In the sootopolis city gym.
Get your badge and go to the elite four. you must get waterfall.
You find him in the last Gym in Sootoolis City.He is the last Gym leader
A powerful electric Pokémon with Shock Wave will take it out pretty quick.
You get it in Sootopolis city. If your playing Ruby or Sapphire. You would be fighting Wallace. In Emerald, You fight Juan.
Juan is only in emerald.
If you mean "Is Juan the leader in Pokemon ruby?", then no. It's Wallace who's the leader. Juan is leader only in Pokemon emerald. The champion is Wallace in Emerald, but Steven is the champion is Ruby and Sapphire.
juan
In the sootopolis city gym.
shut up u stupid people
Get your badge and go to the elite four. you must get waterfall.
by defeating juan at the sootopolis gym
Actually, he was replaced by Juan. So it means that Juan is the gym leader. Wallace is the League Champion.
You find him in the last Gym in Sootoolis City.He is the last Gym leader
A powerful electric Pokémon with Shock Wave will take it out pretty quick.
In Pokemon Emerald, Steven is no longer the Champion. He has been replaced by Wallace, former Sootopolis City Gym Leader. Wallace is replaced by Juan. Steven plays a different part in the story.
Emerald: He is the champion of the Elite Four; Juan is the Sootopolis gym leader. Sapphire/Ruby: He is the gym leader of Sootopolis.