Route 126

Route 126 is a sea route located in the Hoenn region. It surrounds Sootopolis City, where the Sootopolis City Gym is located; Route 124 is located to the north, and Route 127 is to the east.
Similar to Route 124, players can use Dive to go underwater. By using Dive, Sootopolis City and (in Pokémon Omega Ruby and Pokémon Alpha Sapphire, Secret Islet) can be accessed.