Dark Bakugan, also called Chaos Bakugan, are the Bakugan who were created by a mutated Barodius (Mag Mel) and appeared in Arc 1 of Bakugan: Mechtanium Surge. They were created by Razenoid and Mag Mel. Chaos Bakugan are Mag Mel's servants in Mechtanium Surge. They are born from eggs inside the same dimension as Mag Mel's prison and can brainwash other Brawlers. They are used to give Chaos Energy from brawling to help Mag Mel and Razenoid escape from their prison. They share a link or bond with Mag Mel and Razenoid. A typical mass of Chaos Bakugan contains Subterra Iron Dragonoid, Darkus Cyclone Percival, and Ventus Flash Ingram.