What animated show on Cartoon Network did Wil Wheaton have a role in? 
Wil Wheaton:  Wheaton has also appeared in recurring roles as Aqualad in Teen Titans, Cosmic Boy on the "Legion of Super Heroes" and Mike Morningstar/Darkstar in the Ben 10 universe. Ben 10: Ben 10 is an American animated TV series and media franchise created by Man of Action Studios and produced by Cartoon Network Studios.
Ben 10