I would also undersatnd that he recieved minor injuries, but then again, a ten year old kid training in the mountains against all the wild Pokemon? Even with his grandfather, it doesn't sound so believable, how could a kid stand such rigurous training in a dangerous place like that? He's young, his grandfather is old. Even with their oversight, they're not the only ones with tricks out there... This issue could be fixed if you change the age of Kaiser, or change the Ursaring with something that is not actually a killing machine, because, seriously, that's what Ursarings are!
Also, how exactly does the oversight work? Yes, they overcome a Pokemon's will, but what happens when they do this?
I do want a character with the hero ideals in the RP, but the backstory still makes from little to no sense to me... so yeah...
Ok I think I cleared up what you were looking for now