[5] Flynn was hired as a writer on Archie's Sonic the Hedgehog after sending in unsolicited proposals.

[6] He subsequently wrote Sonic Universe; the Capcom series, Mega Man; and New Crusaders, a superhero title published by the Archie Imprint Red Circle Comics.

Flynn made his television writing debut with the Sonic Boom episode "Anything You Can Do I Can Do Worse-er".

[17] Flynn is also a host on a Q&A podcast, known as the Bumblekast, where he previously answered[a] questions from fans concerning the Sonic franchise and his work on the series.

[19][20][21] Although Sega canceled their Sonic the Hedgehog comic series, Archie Comics brought back Flynn, alongside collaborating colleagues Tracy Yardley and Matt Herms, to revive their Cosmo the Merry Martian intellectual property.