Any Good Fan Games To Play With Friends ?

To clarify:

Is there any good fan made pokemon games where I can play with friends ( i.e. trading and battling ) ? I just got the pokemon itch after years and so do my friends and we want to relive the joys of gifting a pokemon or to just duke it out with one another. If it has any other additions like adding most/nearly all pokemon until current gen or combining multiple regions, then that is the cherry/ies on top. Also, no, we don't want an mmorpg type game. Thanks in advance !