The Dark Reverse Dimension, which first appeared in Bakugan: Mechtanium Surge and was later expanded upon in Bakugan: Battle Dimensions, is another universe created by Code Eve that is the complete opposite of Earth. It is where Mag Mel and Razenoid were once imprisoned, as well as the gateway that connects Valhalla to the visible world.
The Dark Reverse Dimension has a direct and symbiotic connection to Earth; even though these two worlds work side-by-side, they do not intersect at all. When there are imbalances in the real world, it takes in these distortions and corrects them to maintain the balance between time and space.
The Dark Reverse Dimension, originally thought only to be a parallel version of Bakugan Interspace, is truly a vast realm of dark and empty pocket dimensions centered around an ultimate world where there is no solid ground where it might be expected to exist and mirror images of scenery are in vertical symmetry with each other. The force of gravity at this realm in the dimension's core gets weaker or stronger depending on the subsequent areas or locations.
Many pillars and crystal shards freely float around the Dark Reverse Dimension's center realm, depicting things in the real world. If the shards are shattered or if any part of a pillar is destroyed, so is the place or thing mirrored within the shard or pillar in the real world.
- The Dark Reverse Dimension is sometimes referred to as the "Reverse World."