At the request of a Mojang developer, we have released this version, that contains no DRM.
Simple drag and drop change for this, just delete the previous version from you mods folder, drop this in and delete your pixelmon.cfg (Found in the config folder).
With the DRM removed, the mod will still collect statistics (Motd, player count, generated ID etc) for a later feature. This is opt-in, and default set to false in your config.
You'll find the update over on the Downloads Page
Such is the way of programming. If there isn't something to be fixed, you haven't done anything at all.