All content posted on this account complies with a veracity policy that is outlined in this pinned Tweet for easy reference.
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For low-quality models used when racers are too far from the camera, Mario Kart Tour uses a simplification algorithm with seemingly no human curation of the result. The racer who is hit the worst by this is Wendy Koopa, whose model becomes mangled in various ways.
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While Mario collects fictional gold coins in his games, Wario in Wario World collects the real-life "American Gold Eagle" official US gold bullion coins (91.67% gold).
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New Super Mario Bros. Wii contains unused Hint Movies where the players play badly and then die. While these were likely recorded before the levels were changed so the inputs don't match up, it is humorous to imagine them being actual intentional hints on what not to do.
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The Super Mario Sunshine debug room contains a seemingly unassuming barrel that will become extradimensional if Mario slides into it. The barrel will appear to be superimposed onto reality like a PNG badly edited into the image.
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In the prototype version of Mario & Luigi: Superstar Saga, Mario and Luigi would have needed to electrocute a living mouse for all eternity to solve a puzzle. This was changed in the finished version to a toy mouse, likely due to the original being absurdly cruel.
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In Super Mario Advance 2, a "pink Mario head replica" object can be created, which will sit on the ground and mimic Mario's head (except in pink). It does nothing when touched, but will give a power-up when eaten.
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In Paper Mario, the Power Bounce badge's maximum number of bounces is arbitrarily capped against bosses, making Mario end the attack even with perfect inputs. Below are ways to determine if the player should feel bad about the missed input or if it was the game's fault.
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Unused graphic found in the files of Mario Superstar Baseball, possibly used as a placeholder for the title screen. It features crude sketches of Mario and Luigi seemingly made in MS Paint and the text "ルイージの兄野球", which translates to "Luigi's Older Brother Baseball".
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The 2026 horror point-and-click adventure game Endacopia contains unused, seemingly deliberately clashing Mario pixel art assets (often jokingly called the "So Retro" art style) in its files. These were likely used as placeholders during development.
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In Mario Kart Wii, asphalt is slightly shiny, reflecting a band of light ahead of the player. This is implemented cleverly by leveraging something that the Wii is already doing, allowing it to not need to use any sort of additional lighting or post-processing.
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Compilation of rare footage of the famously unsettling-looking Donkey Kong 64 decoration at the Nintendo booth at E3 1999.
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Under extremely unfortunate circumstances in Super Mario 64, it is possible for Mario to look like he really should collect a star, but end up collecting a different one instead.
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Addendum: please note that the reasoning given in the video is incomplete; the lower-positioned star's hitbox always overrides the higher one so it would still be collected first even if Mario fell on it from above. I hope the documentation of the phenomenon is still acceptable!
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In WarioWare, Inc.: Mega Microgames, the player can "trust Wario" to provide a name. Most of them are insults and nicknames, but a few are regular names. It is possible that a child actually named Louie or Rufus may have gotten frightened by Wario somehow knowing his name.
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In Super Paper Mario, it is possible for an enemy to die and not die at the same time, entering a glitched state of superposition. Attacking it again is not recommended; the game cannot handle the enemy's paradoxical state and crashes immediately.
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Wrinkly Kong has always been wrinkly. However, for decades, her DKC3 artwork was not available in a high enough resolution to see just how wrinkly she was. In 2025, Nintendo Music finally revealed it in a quality high enough to truly see the immense wrinkliness of her skin.
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It is possible to use a The Legend of Zelda cartridge to unlock the world selection option in Super Mario Bros., by swapping the cartridges without turning off the NES and performing specific actions in The Legend of Zelda before swapping back.
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Super Mario Galaxy 2 contains an unused "yellow zone" that, upon entering it, makes Mario yellow. Being yellow makes Mario run faster.
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In Super Paper Mario, characters sometimes go into the background, making them look far away. However, in reality they just get smaller. By strategically wiggling in place for 9 minutes, Peach can "pop out" of the background, revealing her tiny nature and breaking the illusion.
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Some jingles and fanfares in Mario games are based on snippets of the main theme, allowing the player to time actions to play the jingle as a perfect extension of the music.
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