I've been mulling over whether to bring this guy over and decided more Sol is good Sol. A Sol Agent, Jirou can be put out on infiltration or poaching duties by any of the three Commanders, as needed. But he's also a trainer. With a propensity for failing Gym challenges.
Jirou considers Pokemon to be worth keeping only if they're useful, and enjoys manipulating people into acting in a similar manner for kicks. So if you want, have your character convinced they're letting their Pokemon go to set them free. :)