If you remember the old game was just hunting and fighting. In this game you can request a hunt and you can still fight but now theres tons more. You can have a job and make $$$
There are ton of things to do...if you make enough $$$ you can buy a better house, a gym, or even a lab so you can create NEW pokemon species.
If you want then you can become a theif and steal everthing from everyone you wish. Isn't life fun??
All you need to do is sign up an pick a few stuff.