| Please note the following:
He has a clone named Mama Luigi, who kidnapped him since he was cloned. Luigi usually seems to have a cowardly personality.
Luigi was once in the pound before, for pooping on Mario's lawn. He is voiced by Logan Thirtyacre. He never returned in the Season 1 Episodes 2, 6, 7, and 8 of Mario and Luigi's Stupid and Dumb Adventures. He returned in his own series Luigi's Mansion. He has not had any interactions with Mario until Ghost Jeffy! where he is now voiced by Anthony Miller.
Luigi looks the same as his game counterpart with minor differences.
Similar to Mario, he has a cap and blue overalls, along with white gloves and brown shoes, but has an "L" on a green cap with green clothing (this is because of complementary, or opposite colors), and slightly darker overalls. Luigi is also more slimmer and taller than Mario.
Luigi is a nice and friendly person, but is a coward and gets freaked out easily, until Ghost Jeffy! Where he always tries to find a chance to one-up Mario.
He likes Mario very much and would do anything to be like him.
In Ghost Jeffy!, they roast each other over their games.
He is his clone counterpart.
Chef Pee Pee
They have know that they are friends. But he does not know if he saw him before.
He hates Bowser just like Mario because he knows that he's very evil and an obnoxious asshole.
He has known that Black Yoshi is a criminal. But he never knew Black Yoshi has red shoes.
They both get to arguments. They are enemies.
While not knowing about Jeffy until Luigi reappears in Ghost Jeffy!, he hasn't come to know Jeffy very well only seeing that he is Mario's adopted son and some of that story, thinking he looks ugly (like Mario), and believing he is messed up.
- Luigi was in Woody's pound at one point for pooping on Mario's lawn.
- Luigi has not appeared for a long amount of time in SML videos since The Perfect Plan! or more canonly, Luigi's Mansion series until his return in Ghost Jeffy!.
- A possible reason why he didn't appear for a long amount of time is because Logan can't hold more than 2 plushes since he has to hold the camera. Both Luigi and Mario are voiced by Logan.
- It is revealed in Jeffy Skips School!, that Harold Wilfred doesn't have Mario in his will, and is leaving everything to Luigi.