Wally West is a speedster, the original superhero known as Kid Flash and the third character known as The Flash. His mentor was the second Flash, Barry Allen, who took him on as a sidekick after accidentally duplicating an experiment that had given him powers. Iris West, his aunt, is married to Barry. As a member of the Flash Family he has also worked with the other Flashes, Jay Garrick and Bart Allen. Wally's wife is Linda Park, who he has dubbed his "lightning rod"; their love enabling Wally to be the first person to ever enter the Speed Force and return. Wally has two children with her, twins Jai and Iris. Wally first became the Flash after the Crisis on Infinite Earths, but he has been working alongside the other three since the events of The Flash: Rebirth. He is a founding member of the Teen Titans and a member of the Justice League of America.
In the New 52 reboot, the cousin of the original Wally West with the same name appears, and is initially portrayed as a teenage delinquent meeting the Flash for the first time, and eventually goes on to gain Speed Force powers of his own. The original Wally West makes his return in DC Rebirth as The Flash, whilst his younger cousin becomes the new Kid Flash.
Wally West was created by John Broome and Carmine Infantino, first appearing in The Flash #110. (1960) Wallace West was created by Van Jensen, Robert Venditti, Ron Frenz, and Brett Booth, first appearing in The Flash Annual (Volume 4) #3. (2014)
New 52 Multiverse