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Atomic Destroyer is the collective name for a group of abandoned mechapoly in Sonic Heroes 2. It consists of Atomic Destroyer Zone, Launch Base Zone and Chemical Plant Zone; these zone names have been recycled from Sonic Triple Trouble, Sonic the Hedgehog 3 and Sonic the Hedgehog 2.
Atomic Destroyer Zone
Atomic Destroyer Zone, the eponymy for Atomic Destroyer, is a ghastly mechapolis out of hell; having been dropped like love in a debt-stricken household by Dr. Eggman, the base is now this smoky, sparking, stinking shit tip with few, if any, artificial inhabitants and certainly no natural inhabitants whatsoever.
Launch Base Zone
Chemical Plant Zone
Like Launch Base Zone, Chemical Plant Zone is considerably well kempt, though this time not through use of any kind - if anything, it ought to be the filthiest of the three. In Sonic the Hedgehog 2, Eggman floods the base with MegamalactricarboSonichloride in an attempt to drown Sonic; his assistant (unnamed then but known now as Megatox) was smothered. In a freak of nature, his assistant became one with the Mega Mack, and after Sonic departs, explodes throughout the base. It has laid dormant for some time until immediately after Team Eggman takes off in the Egg Carrier, where upon it wakes up and questions the racket. A small amount of time afterwards, Team Badnik arrive and they fight (Megatox believes the racket to be their doing); after this, they make a pact.
Numerous parts of Chemical Plant which have been drowned in Mega Mack are inaccessible via the main plant itself; perhaps obviously, Mega Mack has a higher density than water and therefore some of the parts of Chemical Plant are directly above rogue water from Aquatic Ruin Zone. (Literally, in some cases, Megatox floats directly on top of water.)