Trainers need lincense to take train Class A pokemon (such as Aggron, Drapion, etc)
Pokemon will prey upon each other
Pokemon League will be the highest authority in all matter regarding pokemon
Some pokemon will only evolve under human care
Pokemon battle will be much, much, more dangerous and much harder
God like Legendaries are impossible to catch, even with masterball
Pokemon like trubbish or grimer will be regularly wiped out from cities
Dragon are the hardest pokemon to train. Takes a year to train them and takes more year to evolve them.
Pokemon Battle will be the most popular kind of entertainment. Since it dangerous, not all people can really do pokemon battle and rather watching gym battles, tournament, and champion challenge.
I think that's for today.
We would probably live in fear cuz it would be impossible to tame them lol
Not really. But both catching and taming isn't a job that everyone can do.