| Game Only: This article belongs to games of the franchise and is non-canon to the main continuity.
| Non-Canon: Characters and events depicted in this article are non-canon.
Ultimate Big Chill Nano is a miniature version of Big Chill's evolved form. He supports the hero with special powers in the game FusionFall.
Basically, he's a miniature version of Ultimate Big Chill, but more computer animated-looking than the original.
- He is the first nano based on an evolved form in the Ben 10 series.
- Although Ultimate Big Chill wasn't released, he is found on Mt. Neverest in Dexter's Lab Containments along with Way Big.