Baby Luigi

Baby Luigi (also called Billy in Retarded64: Mario Goes Shopping) is a baby who is similar to Luigi. He appeared in How Mario Was Born, where Baby Mario took a dump on him.

He later appeared in Retarded64: Mario Goes Shopping, where X calls him Billy, saying to him that he can't play in the street. Mario then runs over the guy, prompting Baby Luigi to say "Dafuq?".

The last time that he appeared was in the (TOTALLY ACCURATE) documentary of Mario where he meets his brother, Baby Mario in an orphan.

Trivia

 * In "when Mario was born" Smg4 says that Baby Mario is his mother but in the "(TOTALLY ACCURATE) documentary of Mario" he meet him in an orphan.