You can play Pixelmon-AU by adding the server in the Minecraft launcher.
On Minecraft Bedrock Edition, open the Minecraft launcher or Minecraft app. Go to the “Servers” tab and press “Add Server.” Enter the Pixelmon-AU IP Address pixelmon-au.comin the “Server Address” and the Pixelmon-AU port 19132 in the “Port.” Then press “Save” and start playing.