In the Sonic the Hedgehog series, he collaborated with Tracy Yardley, the penciller for the series since issue #160. Flynn made his television writing debut with the Sonic Boom episode "Anything You Can Do I Can Do Worse-er".
The collaboration between Flynn and Yardley is highlighted in the context of the Sonic the Hedgehog franchise, specifically within the Sonic Boom series. Flynn made his first appearance as a television writer on this particular episode.