Luigi is Mario's younger brother. He is slightly taller and slimmer. He seems to be a scaredy cat yet can also be kind and thoughtful. He also has his own Series called Luigi's Mansion. Luigi has a crush on Princess Daisy.
- His enemy counterpart is Waluigi.
- Luigi's name is a pun of a japansese word, Ruigi, which means similar. This is because his sprites in the first game was a recolor of Mario.