|This object exists primarily or exclusively within the Pre-Super Genesis Wave continuity.|
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
The Ultimate Annihilator was the ultimate weapon of the original Dr. Ivo Robotnik. It had the power to utterly erase any target from reality. It also had the ability the fire an omega wave, which caused chaos throughout Mobius.
The weapon was damaged by Robotnik in his final duel with Sonic the Hedgehog, and its power was turned against the Annihilator control room, seemingly destroying Sonic and Robotnik in a single, titanic blast. However, the damage to the machine also saved Knothole, and Sonic's friends were able to save his life.
Snively Robotnik managed to kill his uncle by reprogramming the Ultimate Annihilator to target only his uncle's DNA.