Wattson

Wattson is the gym leader of Mauville City, and the third gym leader in the game. He is the gym leader that took the most tries (about 23) to beat during the Pokemon Emerald run of Twitch Plays Pokemon.

During the Randomized Alpha Sapphire run, he was a ground-type leader.

Lore Interpretations
Wattson is famous for his mocking laugh, as well as being one of the toughest Gym Leaders in TPP.

As Zexy was released in Mauville City, some have interpreted Wattson as having killed Zexy.

Trivia

 * Some lore interpretations suggest that between the third and fourth badges of HG, he started a comedy club. His routine consists of laughing at the audience for an hour.