Random Trivia For This Title:
- Princess Daisy was the damsel in distress from Super Mario Land, Mario's first game for GameBoy.
- Bob Hoskins replaced originally cast Danny DeVito. Dustin Hoffman expressed interest in the role because his children were fans of the game while Kevin Costner turn down the offer to play as King Koopa.
- None of the enemies in the film ever refer to Mario and Luigi by their first names. They only refer to them as "Plumbers, Mammals, and Monkeys." The only exception is the desk sergeant, who refers to them as "Marios" and "Mario Brothers."
- First film ever based on a video game.
- Bob Hoskins didn't know that the film he was making was based on a game, until his son asked him what he was working on. When Hoskins mentioned the film's title, his son immediately recognized it and showed Hoskins the game on his own Nintendo.
- Various items from the video games appear, in at least name, throughout the film. These include Bob-ombs (A deceptively tiny wind-up bomb in the film), Thwomps (Thwomp Stompers are oversize footwear), Koopahari Desert (Most of the world is this desert), Yoshi (A small lizard child), The Koopa family (Who are humanized lizards) Goombas (who are just devolved citizens in the film) and Bullet Bills (a bullet with a face, seen when Mario inserts one into a Thomper Stomper to hit Koopa with). The intercom guns used by Koopa and Daisy resemble the NES zapper sold with the Nintendo Entertainment System and the "Devolution" guns seen at the end of the film are simply repainted versions of the Super Nintendo light gun accessory, the "Super Scope". Also, when Daisy is using the panel in the room with her father as a fungus, the noise that boots it up is a sound effect known as the "1-up" noise.
- In his 2007 autobiography John Leguizamo states he and Bob Hoskins hated working on the film and would frequently get drunk to make it through the experience. Both men apparently knew the movie would turn out bad, so they simply tried to make the best of it. He also stated he felt one of the biggest reasons the movie turned out the way it did was because the directors wanted a more "adult" movie while the studio, considering the source material, was looking for a children's film.
- For the majority of the film, Mario and Luigi are wearing generic plumbing overalls. It is only when they need to change that they start wearing their distinctive color-coded uniforms, with the only omission being the identifying letter on their caps.
- An article in "Spy" magazine claimed that the script was being rewritten so many times during production that the actors stopped paying attention to these daily rewrites.
- John Leguizamo broke one of Bob Hoskins's fingers during a stunt involving the Mario van. According to Leguizamo, when it happened, Bob started cussing profusely and incoherently. For the rest of the film, Hoskins is wearing a cast that was painted pink to look like a hand.