Atomic Knight is a superhero appearing in American comic books published by DC Comics, and was briefly a member of the Outsiders team. He is sometimes depicted as one of a group of Atomic Knights, which first appeared in Strange Adventures #117 and ran quarterly in that monthly comic up through #160.
The only Atomic Knights cover appearance in Strange Adventures #144. The giant Dalmatians are also present on the cover.
The Atomic Knights, mid-70s incarnation.
The Atomic Knights from Battle for Bludhaven #6, art by Dan Jurgens and Jim Palmiotti.
The Outsiders are a superhero team appearing in American comic books published by DC Comics. As their name suggests, the team consists of superheroes who do not fit the norms of the "mainstream" superhero community, i.e. the Justice League.
Cover of Convergence: Batman and the Outsiders #1 (June 2015). Art by Andy Kubert.
Art by Kevin Nowlan
Image: Outsiders v 1 01
Cover of Outsiders #1 Alpha (1993), art by Travis Charest