Anyways, no need to rename the pokemon. Instead their appearances change, Houndour would be a coyote, Pikachu would be a Kangaroo Mouse?
Then there's your mounts, each person might mount some different pokemon. While the most popular are Ponytas & Rapidashes, there's going to be Doduo & Dotrio. Hell, I might ride on my Torterra underneath the shade as he goes through the dusty plains, and scorching deserts.
Professors would be the general term for any body of importance and know how in pokemon. Be he the Sheriff, or the Towns Doctor. Not always, but sometimes a school teacher dressed in a white coat.
Starter Pokemon are already tamed, when you get them they'll be in an egg that's about to hatch. So all you have to do is rub on it, and the pokemon will bond with you as it's parent. As for pokeballs, they should be real primitive and very expensive. Just came on the scene along with trains, how they work? No one is for sure, and those who do make them, well just to say they can't give you an reasonable answer. Also downgrade all your money, where you'd normally get $100, or 3k (Yen), you'd get around $10, or 300 (Yen). Your pistol should cost you around $5, and a Rifle around $15. Ammo (by the 100) for both types would cost around $1 to $5.