William

William is one of eight Gym leaders in the Genus Region. His gym is located in Darday City and he specializes in using -type Pokemon.

He is the seventh gym leader you have to face, assuming you can locate his elusive gym. If you can track it down, then a tricky team of ghosts will meet you.

William is also Ellen's older brother and has been something of a mentor to her. He is a learned trainer with the utmost confidence in his team.