While visiting the lab of his uncle-to-be, Barry Allen (Flash II), Wally's life changed by a seemingly random bolt of lightning duplicated the event that gave Allen his speed, granting Wally identical powers.
Thrilled to be Flash's junior partner, Kid Flash, Wally operated as a member of the Teen Titans and was a super hero all his young life. He grew up the only kid sidekick ever to fulfill the job's inherent promise; when Barry died, it was Wally's responsibility to adopt his costume and identity to become the Flash.
Current Version:
The Flash
Former Versions:
Kid Flash