Combustiball is the Hidden Universe's DNA sample of an unknown species from an unknown planet.
- In Ten Plus Twenty, Jen uses Combustiball first to try and defeat D-Soft's army, then to race Super Ben and Gwen 20 as XLR8.
Back in Action: Alien Universe
- Ten Plus Twenty (first appearance; by Jen, x4)
- Welcome to Chronospect (first appearance by Future Ben)
- Meet the Replacements (first appearance by Ben, x4)
- Hooking Up With the K's
- The Armaggedroid (x2)
- Fate of the Helpers
- Leaked (x2)
- In The Sea's the Limit, Future Ben references an alien that acts as a Heatblast and Cannonbolt replacement. Combustiball is the alien he is referring to.
- 3 versions (not to be confused with his modes) of Combustiball were shown off in Cokedragon's Preview-Rama that were up for grabs as the final design for Combustiball. His design was ultimately decided to be the standard "flame" version.
- In Dial Z for Zombified, one other alien that was shown in the Preview-Rama was shown, Bugbite. His final appearance was decided upon for that episode.
- The "freezing flame" version used by Jen may not be the one Gwen 20 or Ben receive, as Stripes has affirmed. The final design for the two is still up for grabs.
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