Luigi is Mario's sidekick younger brother who helps him battle against Bowser to save the princess. Luigi was first introduced as a second playable character in the Super Mario video games. Become the second half of the evil thwarting plumber duo with this Child Deluxe Super Mario Luigi Costume for boys. This costume features a classic green Luigi hat, large black moustache, blue overall shaped jumpsuit with large yellow buttons and attached green shirt, inflatable stomach and white gloves. Make sure to check to see if there are any accessories that you would like to add to really make this costume look complete.