Bakugan City is a place that shown in the second arc of Bakugan: Mechtanium Surge.
With Bakugan Interspace gone, the Battle Brawlers wanted to create a new central for Bakugan battling. They built a city called Bakugan City, where humans and Bakugan all co-exist. The city appears to have a monorail system, and its centerpiece is its large tower surrounded by several battle arenas. Several months prior to the beginning of Arc 2, Dan, Marucho, Shun, and Julie all moved here. Soon after, Mira reunited with the Brawlers with the intention of bringing the Vestal technology she had been developing for the past few years to Earth. Eventually, every single Bakugan remaining on New Vestroia (with the exception of Preyas, Elfin, Ingram, Skyress, Gorem, Aerogan, Taylean, Trister, Tigrerra, Hydranoid, Amazon, Diablo, and a small handful of generic Bakugan) immigrated to Earth, primarily settling in Bakugan City. As a thank-you to the humans for allowing them to stay, the Bakugan built a theme park known as Bakugan Land. The Bakugan also helped the humans in their everyday lives, performing tasks such as digging at construction sites.
The Brawlers built their new headquarters in Bakugan City. The headquarters are inhabited by Dan, Marucho, Shun, Mira, Kato, and later Runo, and are similar to Marucho's mansion in Wardington on a smaller scale.
The city has it's own news network. Julie is employed by the network and does stories about the relationship between humans and Bakugan.
In Mysterious Bond, Dan, Drago, and Reptak searched Bakugan City for Gunz, but failed to find him.