TedStixon

Trivia: Spoilers! There are two credit scenes. In a mid-credit scene, a miniaturized Bowser tries to play his "Peaches" song again, only for a Toad guard to yell at him. In a post-credit scene, it is revealed that a Yoshi egg is in the sewers of New York. It begins to crack and the familiar voice of Yoshi is heard as the screen cuts to black.

TedStixon

Trivia: When Mario and Luigi crash through the wall in the sewers, the hole they leave is the exact same shape as the original 8-bit sprite of Mario's head in the NES game "Super Mario Bros."

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Trivia: In Mario's bedroom, not only is he playing the game "Kid Icarus" on the original Nintendo Entertainment System, but there's also a model of an Arwing from the Nintendo video-game "Starfox" hanging from the ceiling, and multiple posters with subtle references to different Nintendo video games on his walls.

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Trivia: You can see the Crazy Cap store from "Super Mario Odyssey" in the background for a few seconds when Mario and Toad first arrive and are walking through the streets of the Mushroom Kingdom. It happens around the time Toad says the lines, "This guy's brother is going to die imminently, out of the way please! Just trying to clear a path, that's all I'm doing! He's gonna be fine!"

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Trivia: When Mario and Luigi go to their plumbing job at the start of the film, when we first see the dog, the camera dramatically zooms out. If you look closely, most of the books on the bookshelves have titles like "Interior Design" or "Architecture", but there are a few random books mixed in that appear to have nonsense titles like "None" or "Nothing." I have to assume this is a background joke the animators added for people who would pause the movie.

TedStixon

Trivia: When the dog accidentally jumps out of the window and is saved by Mario, you briefly see the dog's owners sitting on the couch. The husband is reading a book called "Galaxy," which is a reference to the game "Super Mario Galaxy." Additionally, on the right side of frame, you can see a statue of a pikmin (a race of tiny, plant-like alien beings) from the Nintendo video game "Pikmin."

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Trivia: During the scenes in New York City, you can briefly see a restaurant called "Chasse du Canard." This is French for "Duck Hunting," and is a reference to the Nintendo game "Duck Hunt," which often came paired on a cartridge with the original "Super Mario Bros." on the Nintendo Entertainment System.

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Trivia: When Mario and Luigi get the Super Star and become invincible, at one point they grab Bowser by the tail and swing him around before throwing him through the air. This is a reference to the video game "Super Mario 64," in which Mario defeats Bowser by swinging him around by the tail and hurling him through the air into bombs.

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Trivia: When Mario tries to enter the castle, one of the guards makes a snarky comment that the "princess is in another castle." This is a reference to the original "Super Mario Bros." video game, in which Mario is repeatedly told that the princess is in another castle.

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Trivia: The film broke several box office records in its 5-day Easter holiday opening, including becoming the highest-grossing video-game movie of all time domestically, beating Sonic the Hedgehog 2's $190 million within five days. It also had the highest opening weekend worldwide for an animated feature. A few days later, it became the highest-grossing video-game movie of all time worldwide. It subsequently became the first ever video-game movie to gross $1 billion globally after four weeks of release.

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Trivia: John Leguizamo, who starred in the original 1993 live-action film, criticized the film and attempted to get people to boycott it as he was upset at what he felt was a lack of Latin characters and actors in the movie. He also claimed that he was the "only one" who knew how to make the movie work. His comments have caused some confusion, as the film does contain several actors of Latin descent, and the titular brothers are Italian.

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Trivia: The Mario Bros. Plumbing commercial jingle is actually the theme song to the "Super Mario Bros. Super Show" from 1989.

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Trivia: Spike, the brutish jerk who serves as Mario's rival in the human world, is a character from the slightly obscure Mario arcade game "Wrecking Crew," which featured a villainous character called "Foreman Spike" who tried to stop Mario from completing the levels.

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Trivia: The pizza shop is called "Punch-Out Pizza" as a reference to the popular Nintendo game "Punch-Out!" Inside the pizza-shop is an arcade cabinet called "Jump-Man." "Jump-Man" was one of the early names used for Mario before they settled on the name "Mario."

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Trivia: Charles Martinet, who has voiced Mario in the games since the early 90's, has two cameos in the film. First is as an Italian man who talks to the Mario brothers at the pizza shop and whose voice is almost exactly like his Mario voice from the games. (He even lets out a classic "Woo-hoo!" just like Mario.) Second and much more subtly, he also voices Mario and Luigi's father, who appears at the beginning and ending of the film.

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Trivia: When Luigi is wandering through the bad lands before being attacked by the Dry Bones, you briefly hear a creepy piece of music for just a few seconds. It's actually a piece of music from the game "Luigi's Mansion," which focused on Luigi catching ghosts inside of a giant haunted house.

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Trivia: When Mario and Luigi are racing to their first plumbing job at the start of the film, there's two really fun easter eggs. First, the entire scene is shown from a profile perspective to emulate the look of the classic side-scrolling Mario games. And second, the construction equipment and supplies they are running past are arranged to look almost exactly like the layout of World 1-1 from the original "Super Mario Bros." video-game. It's subtle and easy to miss, but once you see it, it's obvious.

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Trivia: Luigi's cellphone ringtone is a slightly modified version of the startup sound for Nintendo's Gamecube console.

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Trivia: Nintendo originally started out in the late 1800's as a company that produced a style of playing cards called "hanafuda." In the scenes taking place in Brooklyn, you can see a billboard for hanafuda playing cards as a reference to Nintendo's more humble beginning.

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Trivia: When Mario briefly walks by the antique store, a Toad asks if the gizmo he is holding works, and the shopkeeper in the background can just barely be heard saying the Toad might have to blow into it to make it work. This is a cute callback to the popular theory that blowing into Nintendo cartridges makes them work better, since it helps get rid of dust that could block the connectors... although it's not unanimously agreed that this actually works.

TedStixon