Answer: Wario

When Nintendo was searching for a name for the character that would become Mario’s dark doppelganger, they didn’t have to look far. By combining the word Mario with the Japanese word for bad “Warui”, they came up with Wario. Even better, the W in English looks like an inversion of the M in Mario. When it came time to cook up an evil copy of Mario’s brother Luigi, they used the same naming convention: Luigi became Waluigi–sadly, not quite as catchy and visually appealing a name as Wario.