The Chariot Master is a character that appears in Kid Icarus: Uprising during Chapter 19, which is called The Lightning Chariot. Pit has to fight him at the end of the level, and they are both riding chariots.
Kid Icarus: Uprising - Idol Description
"Master of the Lightning Chariot. Long ago, he fought in wars of the gods. His body may be ruined, but by walking the soldier's path in death, the master's soul still burns. He fights Pit to determine if the angel is worthy of the chariot."