Luigi

1. Luigi is a fictional Italian plumber from Nintendo's Mario franchise. Luigi's clothing is like his brother's: overalls, gloves, shoes, a longsleeve shirt, and a hat with an 'L' on it. However, he wears green, not red. He is quite different than Mario physically. While Mario is short and chubby, Luigi is tall and lean. He also jumps higher than Mario and is better liked by fans. Luigi is a mixed bag. He has no trouble joining his brother to fight Bowser and rescue Peach, but is often shown as a coward in other games, such as Luigi's Mansion, the first game to have Luigi as the hero. In that game, Luigi battled ghosts with nothing but a vacuum to save Mario.
Luigi is famous for living in his brother's shadow. He is usually the 'second player', and isnt even in some games. In fact, Luigi usually gets treated unfairly. While Mario gets kisses and cake, Luigi gets nothing. Luigi stayed Mario's sidekick until an announcement from Nintendo in 2013.
Nintendo announced that Luigi had been around for 30 years! Luigi deserved some love, and so Nintendo made 2013 the Year of Luigi! The whole year was dedicated to him, with specal games coming out.
So remember, you'll get a chance at stardom one day. Just be patient and grab it while you can.
2. A traditionally Italian male's name.

1. Luigi is my favorite Mario character!

2. Hey, Luigi! Come over here!

Mario

1. A rather portly fictional Italian plumber who serves as the protagonist of Nintendo's popular video game franchise named after him. He has also come to represent Nintendo and, to an extent, video games as a whole. Mario wears denim overalls, a red shirt, white gloves, brown shoes, and an iconic red hat with the letter 'M' printed on it. He also has a large black moustache. He resides in the Mushroom Kingdom with his brother Luigi. They are usually hard at work searching for Princess Peach, who is constantly being kidnapped by the villainous Bowser. They are also known for being exceptional plumbers, perhaps explaining why they travel through sewage pipes often...

In his free time, Mario and his friends often play sports such as tennis, golf, and soccer, and have even competed in the Olympics against another popular video game character, Sonic The Hedgehog. They also throw parties occasionally.

Mario is by far Nintendo's most popular character and franchise. His games have spawned several other series of games (Donkey Kong Country, the Yoshi games, etc.) that have also done well. He is known across the world, and most Mario games sell very well. He is an icon that will be remembered for many, many years to come.

2. An male's name, originally from Italy. (Simple, I know...)

1. I just picked up the new Mario game!

2. That's my Italian friend Mario.