Death Egg

The Death Egg is an object in the Sonic the Hedgehog series. It was constructed by Dr. Ivo "Eggman" Robotnik. It is the first and most famous of Eggman's space stations. Hosting some of the doctor's most deadly creations of all time, this vast stronghold serves as the scientist's ultimate weapon and key component in his various quests for world dominance.

Appearance
It is a massive orbital fortress and space station as reference of Death Star from Star Wars Movies.

Trivia
The Death Egg is an obvious reference to the Death Star, the Galactic Empire's giant planet-destroying battle station from the Star Wars movies (specifically A New Hope and Return of the Jedi). Unlike the Death Egg, the much larger and better-equipped Death Stars had colossal amounts of weaponry, as well as huge swarms of TIE Fighters, star destroyers, stormtroopers and other military personnel patrolling it, a deflector shield, and finally, a single superlaser capable of destroying an entire planet. The Death Egg's "eyes" and rough surface are a spoof of the Death Star's physical appearance.
 * The Death Egg Mark II, likewise, is a reference to the second Death Star in Return of the Jedi, down to it being constructed in close proximity to a forested planet (in this case, Little Planet), was much larger than its predecessor and possessing a generator around one part of the ship that was implied to be not completed yet.