>>18928166Because he was keeping them in cages and poor conditions which could be considered animal abuse. Also nowhere in the series does it say you're allowed to sell Pokemon. Maybe the game corner can do it because they're licensed, and could get licensed because they don't neglect or abuse the pokemon.
>>18928301Training monsters is obviously a lot harder than the games make it seem. The player character is always some autistic prodigy that trains a powerful team with ease. Notice how virtually no one else in the world even has a full team, let alone a team as good as yours?
It's probably easier to brainwash trained pokemon than to catch them in the wild and raise them.