Xenon is a planet in the Milky Way Galaxy. It is one of the darkest and fearful places in the galaxy, it is covered with perpertual darkness and filled with asteroids, thus being the place of no return. The Galvan named Azmuth lived on this planet. Azmuth designed Xenon to escape from the havoc and mayhem in the galaxy (wars, battles, invasions, etc.). He created a device that absorbs all light in the vicinity. That, combined with the millions of large asteroids surrounding the planet, force ships, who attempt to even come close, to crash blindly onto the asteroids. Azmuth created a homing beacon in the Omnitrix so that if it is ever in range, the Omnitrix will lead the bearer through the dark oblivion to get to its creator.
- It may be a spoof on Superman's Krypton, as it is one of the noble gases.