Luigi

Luigi is the younger overshadowed Mario brother, and is the boyfriend of Princess Daisy, he wears his tradition Green Shirt and a Dark Blue Overalls or to others known as Navy. His new appearance is his shirt that is still long sleeve. But he wears finger-less gloves. When he is sleeping, he wears navy blue and green striped tracksuit. Luigi tends to be in Mario's shadow a lot of the time and also tends to be scared easily or harder. He is the star of Luigi's Mansion, and his main enemy is King Boo.

Guppy the Shark
Luigi makes a cameo in the game several times, especially in dialogue. Some fish talk about the "other brother", the "green-clad man", and the "Boo Bustin' Buffoon".