It is surrounded by water and only accessible by teleporter. It appears to have real fish in the water around it, as seen in episode 20, which is strange due to the fact the only "animals" in New Vestroia are the Bakugan. Even though no people are seen, it can be assumed that people live there just like Alpha City. Shadow and Mylene keep watch over this city and its Dimension Controller until Dan and Baron destroy it. Mira finds Ace, Marucho, and Shun and Spectra frees them for her.
- The battle area for Beta City is underwater.
- This is the place where Shun, Marucho, and Ace were held captive.