Why are so many people surprised to learn that Mario and Luigi are twins? - Quora

What's the relationship between Mario, Luigi, Wario, and Waluigi? - Quora

Wait, what? Luigi is Mario's twin??? Found this on the Super Mario Run App. : r/Mario

Can I name twin boys Mario and Luigi? - Quora

Why are so many people surprised to learn that Mario and Luigi are twins? - Quora

Did you know that Mario and Luigi are twin brothers?

Those who dream by day are cognizant of many things which escape those who dream only by night - ART FLAIR

I Literally Just Learned Five Seconds Ago That Mario And Luigi Are Twins

Why do people find twins and other multiples to be so fascinating and often view them as weird? - Quora

What Nintendo character do you feel bad for? - Quora

Why are so many people surprised to learn that Mario and Luigi are twins? - Quora

What do you find funny about Wario and Waluigi? - Quora

Why are so many people surprised to learn that Mario and Luigi are twins? - Quora

Why is the Japanese version of Paper Mario and Paper Mario: The Thousand-Year Door got more glitches than the American version? - Quora

What are some of the most interesting identical twins' stories you have heard? - Quora