Sonic X
Archie has also produced two Sonic series based on other branches of the Sonic franchise, namely the "Sonic X" anime and the "Sonic Boom" cartoon. The "Sonic X" series began in September 2005, and ended after forty issues in January 2009, the last of which featured a crossover story with the main "Sonic the Hedgehog" series that served as a prequel to the first "Sonic Universe" issue. The "Sonic Boom" line began in October 2014, and was later incorporated into "Worlds Unite" before concluding with its eleventh issue in September 2015.