PMU is currently running pixelmon 3.2
So make you sure you have that version of pixelmon installed before you try getting on the server.
PMU has a lot of features to offer everyone!
Build a base - Build a base with some friends
Catch Pokémon - Pokémon can be found all over the world
Become an Gym Leader - Players are the gym leaders. So get ready!
Battle Gyms - Why fight all those boring NPCs? When you can face the gym leaders
Elite Four - Once you beat all 8 gyms you can challenge the Elite Four! They wont go easy on you =]