|This article belongs to the Original Continuity.|
Rapid City is a city located in South Dakota that appeared in Secrets.
Rapid City first appeared in Secrets, where Vilgax attacked the city in order to lure out Ben and capture him so could remove the Omnitrix. The plan worked, and Rapid City became main stage to a fight between Heatblast and Vilgax.
- Secrets (first appearance)