Pokémon Ruby and Sapphire/Route 107

Route 107 is a long, straight waterway with few surprises and no Items. There are trainers here.

Sis and Bro Lisa & Ray
 * Swimmer Beth
 * Level 25
 * Level 25
 * Level 25
 * Swimmer Darrin
 * Level 27
 * Level 28
 * Level 26
 * Swimmer Tony
 * Level 27
 * Swimmer Denise
 * Level 27

After Denise, head east to Route 108.