Pokemon: I Learn Swordsmanship from Greninja

No System + Pokemon + swordsmanship + one heroine + mildly dark

Su You was inexplicably dragged off by Arceus and made to work as a wage slave. With his heartless boss squeezing him dry, all he had was Telepathy?

Could his innate <Energy Control> let him gain extraordinary powers like Sabrina and Lance?

While doing under-the-table work for Team Rocket, Su You also made sure to train hard in swordsmanship under Greninja.

"You hear me, Alpaca? Just wait. I'll sharpen my blade, then come over for tea!"