X'Nelli is the multi-terrained planet where many species of Manzardrills live.
X'Nelli is one of those rare planets in the universe that exists in what is known in scientific circles as the Goldilocks Zone, meaning it is precisely the right distance from the star around which it orbits so that the planet is not too hot, not too cold, but just right. Like Earth, for example.
As a result of this, it can support a huge variety of environments suitable for all kinds of wildlife.
In the part 1 of the 2-part finale, Squidface Becomes A Threat, Squidface and Arthur end up landing on X'Nelli, after they were shot by a Sluggainein ship. Arthur ends up using an Wolfenstein's, a wolf-like alien that live on the planet, brain to resurrect Squidface back to life. Arthur and the revived Squidface leave the frozen wasteland in the beginning of Part 2.
X'Nelli will make its first appearance in Polar Opposites.
In Dillion Million: Omniforce, X'Nelli is also the home of Dill Reekalaw's pet's species, The X'Nelli Moniters.