So my friend and I just discovered something called Evolve, and if you are in a party with an unlimited number of people, it simulates a LAN server, and works very well with Vanilla survival. Sadly, I had no luck with Pixelmon... (same versions of Minecraft and mods by the way), is it possible?
You would need to set up the server edition of Pixelmon and instead of having the IP accessible to the internet, use a local IP that can be connected to over LAN.
Pixelmon on a LAN Server?