Quoted By:
In the manga it explains that you can't give your attention to more than 6 pokemon at a time(food, training, etc?). Which makes sense if you consider that pokemon likely have, at most, an average plateauing intelligence of a 15 year old, while others have astounding IQ(just without the capability of speech usually). So if each pokemon has the capability of maiming or killing you on the spot, chances are you want to not mistreat your pokemon, or worse, letting it kill a human. It's like batman, if he kills one person with a gun, it'll be easier to kill 10 more with a gun. There was also a pokemon battle frontier episode where an ancient ghost possessed Ash and told his Sceptile to hold a leaf blade to the ref's neck?
Also it's a fucking game faggots.