TangoMC is a Pixelmon server that I recently started playing on. I have about an hour logged in now, but I can say that this is easily one of the most friendly and inclusive servers I have played on in my Minecraft career. It provides help without pushing endless advice in your face, but doesn't leave you hanging. The staff and community are also incredibly helpful and nice. The server is fluent and has very little lag, as well as many various features that create a fun environment for people new to Pixelmon and experience Pixelmon vets. I totally recommend this server to anyone who is looking into Pixelmon.
tldr: Great server, 10/10