The Death Egg Mark Four is the fourth model of the Death Egg, a gigantic battle station, built in Mario's world as Bowser's base of operations during the Bowser Saga. Unlike the previous versions of the Death Egg, the rear half of the Death Egg has a design based on Bowser's shell. 


Magolor Saga

The blueprints and schematics of the Death Egg Mark Four were first revealed by Lien-Da after her meeting with Eggman and Bowser. Its schematics are revealed to contain elements from the three previous Death Eggs.

Bowser Saga


  • The Death Egg Mark Four contains combined elements from the first Death Egg (Sonic the Hedgehog 2 to Sonic the Hedgehog 3 & Knuckles), and the Pre-Super Genesis Wave Death Egg and Eggdome from the Archie Comics series.
    • Despite this, it does not have the egg shape of either the Pre-SGW or Post-SGW versions of the Death Egg, nor does it possess an Egg Stache Flyer. These traits are instead used for the Death Egg Mark Five.
  • The Death Egg's command room possesses the slot machine from Eggman's first base in the Sonic X series.

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