At some point after Haruki/Z's departure from Earth, STORAGE upgraded Sevenger to be as strong as King Joe STORAGE Custom as well as the capability to explore the outer-space designated Space Sevenger. Yoko piloted it together with Yuka in their outer space trip to test out the warp technology. As part of the upgrade, Sevenger was given a high performance battery with an indeterminate time limit, allowing Sevenger to remain active for significantly longer periods of time.

Following the conclusion of Ultraman Z, Sevenger was fully promoted back to being one of STORAGE's primary operating units, and was eventually given an additional configuration for operation in outer space and on other planets, being designated as Space Sevenger. On one of its initial missions, in which it journeyed to a planet inhabited only by monsters in search of Z, Sevenger was ambushed by the monsters and was severely outnumbered. The Lawless Monster Planet Fortunately, Z and Juggler arrived to help Sevenger, and the trio took down the monsters that had been threatening the machine.