Jason

Jason (Japanese:???, ???) is the ??? Gym Leader and the owner of the ??? Gym. He specializes in -type Pokémon and gives the Plague Badge to Pokémon Trainers who defeat him.

In the games
Besides being a Gym Leader, Jason is a famous graffiti artist and Jethro's older brother. His Gym is the fifth to be challenged by the player, and those who defeat him are given the Plague Badge and TM??? (???).