Sootopolis City Gym

The Sootopolis Gym is the final gym in the Hoenn region. However, the Gym is unaccessable until you stop Kyogre (Sapphire Version) or Groudon (Ruby Version) or summon Rayquaza (Emerald Version). In Ruby and Sapphire, the Gym Leader is Wallace. In Emerald, the Gym Leader is his mentor, Juan. Both use -type pokemon.