Mega Man Star Force, known in Japan as Shooting Star Rockman (流星のロックマン, Ryūsei no Rokkuman?) in the original Japanese language version, is an anime and manga series based on the video game of the same name.

The anime first premiered in Japan on October 7, 2006, two months before the game's Japanese release, and concluded March 29, 2008. The manga was serialized in CoroCoro Comic in September 2006. The anime was licensed by Viz Media and first premiered in English on the online streaming video service Toonami Jetstream on July 23, 2007. On August 25, the series made its television premiere on Cartoon Network with a 2-hour special.

Mega Man Star Force follows the adventures of Geo Stelar and his extraterrestrial partner Omega-Xis, a duo capable of merging together through "Electromagnetic Wave Change" to combat the invading FM Planet's forces.

Source: Wikipedia