Hmm... I suppose that's right. I'll admit, I haven't seen as many as there claims to be. It feels like every day I see a new one of these creatures.

Perhaps they do train some of them specifically for protection, I wouldn't be surprised if the police used them to catch criminals. I don't think I'm really the appropriate person to ask that sort of thing to though...

Could someone at a PokéCenter help you? Considering their job is to look after them they might know which ones perform best as a guardian.