Startup Issue with Minecraft - server fails to launch, failure with mods

  1. Go into the settings, select the version of Forge that you want, and press Donwload/Update
  2. See if it starts
  3. Try running the server without pixelmon and make sure forge starts correctly.
    i. If so, delete the world folder before adding pixelmon again
  4. Make sure you’re using the right Java version for the version of Forge you’re running

Also, take a read through this FAQ here if you run into further issues: