Ryuusei no RockMan: Leo/ Mega Man Star Force: Leo

Mega Man Star Force takes place in the fictional year of 220X where two hundred years have passed after the finale of Mega Man Battle Network series, when emphasis on internet technology has lessened, and instead, the world has become networked through use of EM Waves. Though cyber worlds and NetNavis still exist in Star Force, human dependency on them has greatly decreased, and people no longer have Navi companions. instead relying on Transers. Three large satellites orbiting the Earth—Pegasus, Leo, and Dragon—power the EM Wave World that exists around the Earth's atmosphere, keeping the world networked. While the EM Wave World is normally invisible to the human eye, a special piece of eyewear called the Visualizer (possessed by the series's main protagonist) allows a human to see this other world. However, like with the cyber worlds of Battle Network, EM Wave Viruses inhabit the EM Wave World, causing problems in everyday life.

Mega Man Star Force introduces a new lead character, a boy named Subaru Hoshikawa, who puts on special "visualizer" goggles left to him by his father, triggering a specific wave and summoning the presence of a mysterious alien life form named Warlock. Dangerous creatures from Warlock's planet have come to attack Earth, so they must join together to transform into Mega Man in order to defeat these menacing forces. Specific to the Leo version - turning up the heat, Fire Leo uses a special Flame Burner attack that can incinerate enemies in its path.