Fun Flash Facts: There's Been More Than One Flash superhero. So, Barry Allen wasn't the first Flash, and as it turns out, he was far from the last following his apparent death.
Wally West was originally introduced as Barry's sidekick, but the youngster aged quite quickly and was soon made Barry's replacement to fill the void left by the original's disappearance.
He served as The Flash for years, and depending on a person's age, is in fact The Flash for some readers. Bart Allen (Barry's grandson from the 30th Century...don't ask) also became The Flash, while Wally's kids also got involved with the family business of speeding at one point. This was all scaled back when Barry returned.