It s Mario s popular younger brother Luigi! Limited availability Super Mario Bros. plush doll. Soft and squishy, Luigi looks just like he should! Mario s popular younger brother Luigi is the star in this official Super Mario Bros. plush doll. Soft and squishy, Luigi stands approximately 9-inches tall and looks just like he should! Limited availability. Luigi is Mario s younger, taller twin brother. Luigi has assisted and fought alongside his brother on many occasions. Throughout his life, he s lived in Mario s shadow, developing both cowardly and heroic tendencies. Mario Bros. marks his first appearance in a Super Mario arcade game. Originally a color swap of Mario, Luigi was created to facilitate a second player option. Since the two-player mode was dropped from most Super Mario games beginning with Super Mario Land, Luigi gained his own identity and personality.