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Citadel2

The Egg Bastion, under construction during the Battle for Mobius.

The Egg Bastion is Doctor Robotnik's newest and current base of operations, located in a desert region of Mobius. Built around the Chaos Tap, from here, Robotnik can monitor and control Badnik and mecha activity all over the planet. Sonic was able to break in easily during its construction in the Battle for Mobius, but since then its defences have been fortified both inside and out, though Sonic does know of a few weak points. It is unclear if Robotnik is aware of these, though he is well aware that the Chaos Tap is currently inactive, its power having been drained by Knuckles with the Grey Emerald.

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