The Assault Drone Mk. II (アサルトドローンMk.II Asarutodorōn Mk. II?) is an enemy that appears in Sonic Chronicles: The Dark Brotherhood. It is a model of Badniks which was locked up in Eggman's Hazard Vault because it was too dangerous. They are an empowered version of the Assault Drones.
The Assault Drone Mk. IIs were created by Dr. Eggman, but were stored away inside the Hazard Vault in Metropolis because they were uncontrollable and too unstable. When Angel Island fell down into Metropolis at the end of chapter 5, it opened up the Hazard Vault, releasing the Assault Drone Mk. IIs, along with other robots, and sending them rampaging through the streets.
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