But THEN WE HAVE THE MOVIE!!!!

Something I love about the Mario movie is how is basically squashed any kind of ideas of Luigi being jealous of Mario from the get go that fans have come up/theorized throughout the years.

The whole “Luigi is jealous and tired of living in Mario’s shadow” has no leg to stand on when it comes to this movie.

In fact, Luigi is actively the one singing praises towards Mario, he knows that his brother dreams big and has a big heart, he knows his brother is amazing and he loves him for that.

Does he have low self esteem? Absolutely. But there is absolutely not a single bit of jealousy/envy towards Mario, Luigi loves and adores him far too much to ever be jealous and angry at Mario, someone who means the absolute world to him.

Oh don't you get me started.

Too late, I’ve gotten started. YOU ARE SO RIGHT. The movie did to theories that Luigi's “bitter and jealous” what it did to theories that Mario’s an antisocial asshat.

There are two things I can point to that are to blame for the theories that Luigi is bitter and jealous:

The description of his Negative Zone final smash from Super Smash Bros. Brawl:

"Luigi's final smash. As exotic music plays, he performs a dance befitting a sorcerous incantation. A barrier envelopes him, negatively impacting all in his area. Random effects include getting launched, sleeping, moving in slow motion, tripping, fainting, and losing attack power. This technique is a reflection of the dark side he embraced in his brother's shadow."

2. His characterization in Paper Mario

But there’s like… almost 40 years of games to glean from. You can literally pick and choose whatever you want to form any sort of theory (like a certain internet man did when arguing that Mario is an animal abusing sociopath). But 99% of the games show about as much evidence that Luigi is bitter as they do that Mario is a bad person– none at all. Quite the opposite, in fact.

As for Paper Mario, it's the only time Luigi is directly characterized as envious... NOT jealous. He still loves his brother and sees him as worthy of the praise he gets, but he feels bad being stuck at home, and desperately wants to be brought along for the adventure– to have his opportunity in the limelight. But Paper Mario is kind of its own thing, established to be a separate universe from the mainline Mario games. In the Super Mario Brothers RPGs– which delve deeper into the bros character while remaining more aligned with the classic "canon"– the dynamic is quite the opposite! Mario dives headfirst into danger while Luigi desperately avoids it unless there is no other choice. In Super Mario Brothers Superstar Saga he tries his darndest to not be taken along for the adventure, confident that his brother can handle the task.

But one consistent across the Mario games is Luigi being the underdog of all underdogs; unlucky and clumsy, the butt of the joke, and constantly undermined. Naturally this causes people to get defensive of him– get angry for him, and project their feelings onto the character himself.

But tHEN WE HAVE THE MOVIE!!!!

Nintendo is given a chance to craft Mario and Luigi into fully fleshed-out characters with motivations and backstories, not just plucky videogame personalities for people to project themselves into, and boy oh BOY did they knock it out of the park.

While Mario is still a headstrong hero with a never-say-die attitude and a heart of gold, everything he does is for his brother. Mario has insecurities about feeling small and wants to prove himself to his father, but in the end his love for Luigi is his main motivator. Mario can handle being threatened, made fun of, and told he’s crazy, but if you want to truly hurt him, tell him his actions are hurting his brother. Try hurting Luigi directly, and Mario will tear you a new one.

In return, everything Luigi does is for Mario! Lu’s not the willful ball of determination and gusto that his brother is– he has always been nervous, softhearted, and sensitive, which is why he lets his brother lead the way. Luigi’s not living in Mario’s shadow, he’s thriving off of his confidence! He recognizes Mario as his best friend and greatest source of strength, and will follow him absolutely anywhere.

There is no sense of Mario being treated like the beloved star of the show while Luigi gets the short end of the stick. They are both downtrodden, both learning, and both dependent on each other. It's not just Super Mario, it's the Super Mario Brothers, who equally inspire each other to be the best version of themselves.