1, Luigi. Wario, Waluigi, and other characters are either friends or other relatives.
Mario has two younger brothers
He had 11 younger brothers.
She has three younger brothers & one younger sister.
She has three younger brothers & one younger sister.
She has two younger brothers.
He has 3 younger brothers
Mario only has one younger brother - Luigi.
Morio Agata's birth name is Yamagata, Morio.
He has 3 younger brothers
That would be his younger brother
Rihanna has 2 younger brothers.
He doesn't have brothers. But he has a younger sister. Called Bernadette Galbraith.