After Bun was saved from an Alien Hunter, he gained speed, agility and reflexes on the desert planet Blue Star. He also learned survival skills on that harsh planet, such as surviving 30 days on one cup of water and how to climb walls.
Bun with the others are being called by Jin to the Flash Star. They are informed that Reconstructive Experiment Empire Mess has set their eyes on Earth. They head to Earth using Round Base without permission to the elders of the Flash. As they are travelling, Mag seeks them as intruders and shoots them, only for Sara switching it off by removing its floppy disc and Dai punches it. Arriving at Earth, they shoot some Laboh Fighters using their machines (Bun and Lou use Jet Seeker). After they land on Earth, they meet Mess' generals, a band of Zolohs, and The Baraboss, owing Mess revenge for 20 years. They attack the Zolohs, before the generals then attacks them, with Leh Näfel attacking Bun. Then, they change into Flashmen and fight Zolohs using their signature weapon (in Blue Flash's case, the Prism Ball). After that, they destroy The Baraboss using Rolling Vulcan, making the generals retreat into their base.