The Victim of Galactic

Noel, age 17 and a respected Pokemon trainer, has heard that his sister has been kidnapped by Team Galactic. Furious, he storms into the head quarters where he becomes a victim of experiments. The next thing he knows, he's a Celebi!

Excerpt:

I slammed my balled fists against the glass tube I was being held in.
"Hey! Stop this! You're going to kill everyone! You need to stop!" I relentlessly screamed.
"We won't kill them ... They'll just have to bow down. Of course, if they fail to realize who the superior being is," A man who donned a white lab coat spoke.