Huh? Always thought it was Mario until someone changed thier mind and wants to complicate things.

This is total BS and retroactively constructed, just read the last sentence of the article and you can infer M stands for Mario because they say L on Luigi stands for “litigation” over their IP. No one thought of that decades ago, Nintendo trolling their fans

Luigi's hat stands for Legend of Zelda?

Then why does Luigi have an L on his?

Just like how the "L" on Luigis stands for Link,

I heard it stands for rated M for Mature

John Metroid, acshually.

This must be that Other M I've heard so much about

Pretty sure it stands for this

I thought on his planet it stands for: “Mope”.