The doll version of Sparky first appeared in the Atomic Betty pilot, the Sparky doll would transform into Sparky to help Betty fight off evil Maximus I.Q.. However, when the TV series began, the Sparky doll was dropped and Sparky became a real alien for the TV show.
- The Sparky doll still makes cameos in some episodes and in a title screen.
- When the Sparky doll is finally appearing in the show's revival onward, Rick Miller is providing his voice in the show's revival, which'll sound exactly like that of Sparky, the real alien from the show itself.
- In the original concept, Betty carries the Sparky doll all the time.