This is the real world.
What Poekmon would you have, realistically? The amount of Pokemon you get to have is dependent on how many pets you can take of in real life at this point in time.
Pokemon are allowed to be carried outside of their pokeballs, but with certain regulations on larger pokemon and in certain areas and certain overly aggressive pokemon are illegal to own unless you the correct badge/license, Legendaries are urban legends and not an option.

Can you realistically justify owning your Bro irl?