Cosmic Boy was one of the three founders of the legion of Super-heroes, along with
Garth Ranzz (AKA Lightning Lad) and Imra Ardeen (AKA Saturn Girl). He is known to bicker with Garth on multiple occasions, even before they founded the Legion.
- Cosmic Boy was voiced by Wil Wheaton.
- 16 Appearances of Rokk Krinn (LSHAU)
- 6 Images featuring Rokk Krinn (LSHAU)
- Quotations by or about Rokk Krinn (LSHAU)
- Character Gallery: Rokk Krinn (LSHAU)