A new version of Pixelmon has been released with some awesome new features! This means that the server, as well as you, will need to update to the next version. If you're unaware of how to do it, I'll tell you!
For Pixelmon Launcher, here's what you need to do. (If you don't have Pixelmon Launcher, you can download it from here http://mirror.pixelmonmod.com/launcher/beta/ )
Open your Pixelmon Launcher, and click the icon with three lines and a pencil at the bottom right.
Now, click the Pixelmon Drop Down Menu.
From here, select Minecraft 1.10.2, and choose Pixelmon 5.0.2
Then simply click Save and launch Pixelmon!
For regular Minecraft it will be a bit different.
You're going to start off by downloading the newest version of Pixelmon from the following link: http://mirror.pixelmonmod.com/core/5.0.3/
Once this has finished downloading, press the Windows Key and R at the same time.
Once the menu has opened up, type in %appdata% and press enter.
Next, you will need to navigate to your .minecraft folder, and then open the folder called "Mods."
Once in this folder, delete your previous Pixelmon version and install the new one from the download link above.
Now, you're finished! Just run Minecraft and it will work.
If you are new to the community, stop on by and join the Discord!
Discord: Happy Cloud Discord
And as always, happy gaming!