After West 's apparent death in the Infinite Crisis crossover event in 2006 , Allen grew up and became the Flash .
For most of his superhero career , Bart was the sidekick to the Wally West version of the Flash .
After Wally West 's apparent death in the Infinite Crisis crossover event in 2006 , Allen grew up and became the Wally West .
For most of his superhero career , Bart was the sidekick to the Wally West version of the Flash .