In Super Mario Odyssey, the inside of Mario's model is normally protected from prying eyes through a dithering effect, activated when the camera gets too close. However, by strategically placing him on specific slopes, the effect fails to activate, allowing a clear look at Mario's insides.

In Mario Party, landing on a Bowser Space while having no coins or stars normally results in Bowser taking pity on the players' bad fortune and giving them free coins instead. However, there has sadly been a trend of Bowser becoming steadily less compassionate over time, as shown by this graph.

In 2023, I posted about a bizarre Dolce & Gabbana shirt featuring Mario standing in a beam of light alongside text praising him. I have tracked down the source of the image, which was a splash page in the E3 2000 brochure. Now the venerated Mario can be seen in high quality.

The ending to the Super Mario All-Stars version of Super Mario Bros.: The Lost Levels will become corrupted simply by Mario being too close to the right edge of the screen. While Mario will remain normal, Peach will become an uncanny jumble of corrupted graphics.

According to Motoi Okamoto, Mini-Game Director for Super Mario 64 DS, Shigeru Miyamoto would start midnight crunch sessions for the game's development by walking into the office and announcing "It's Mario time."

In Paper Mario, Mario normally jumps onto Lakilester's cloud to use the Cloud Nine move. However, a small cute detail occurs if Mario is asleep or otherwise unable to jump onto the cloud, which causes Lakilester to gingerly pick him up from the ground himself instead.

In Mario & Luigi: Brothership, Starlow bizarrely claims herself to be "an eight-headed beauty". This is actually a mistranslation. She actually refers to eight-head body proportions, used traditionally for fashion illustrations, instead of literally claiming to have 8 heads.

In Super Mario World, Mario can use lava to create life from nothing. Throwing an empty Koopa shell upward on the frame it would sink into lava will make it turn into a living Koopa. It can then be extracted from the shell and the process repeated indefinitely for infinite life.

Mario & Luigi: Brothership contains a rare "Long Legs Luigi" glitch whereby in the final boss battle, Luigi may become frozen in a jumping animation with his legs elongated.

Official 2017 legally binding Mario/Peach-themed marriage certificate from Japan. Filling out this form and submitting it at the municipal office of residence immediately results in a recognized marriage once processed.

In Mario's Early Years: Fun with Numbers for the SNES, there is an Easter egg where three photorealistic developer heads will appear on Mario's windowsill and chant "Hello, hello, hello" if one very specific pixel of the screen is clicked.

In Mario Kart 8/Deluxe, the Dragon Driftway takes place on a giant dragon based on Gobblegut from Super Mario Galaxy 2. The full dragon is never seen in-game all at once. Here is the track model with everything but the dragon removed.

In Paper Mario, Mario has 8 partners. However, there are enough unused and scrapped partners referenced in the game's files to make another full party. Here is a glimpse of an alternate reality with all of Mario's potential partners.

In Mario & Luigi: Superstar Saga, the Mini-Mario ability prevents music from changing properly in some cases. This can lead to a variety of unfitting music scenarios such as "Mournful Surfing", whereby Mario will surf joyfully at a sunny beach while tragic music is playing.

In the Nintendo Switch version of Super Mario Galaxy, the ending can now be seen in a higher resolution. This reveals that two Toads that appeared to be running joyfully around a statue before are actually gliding around the statue in T-poses.

In the Japanese version of Mario Kart World, the "SPECIAL test of skill" missions are named "Even the Mario Kart staff were surprised!", a reference to the name of the Way Cool course from the Special Zone in Super Mario World. This is why the SPECIAL is in all caps in English.

Super Mario Strikers and Mario Strikers Charged contain a threatening comment in the code for the shot accuracy variable: "DO NOT TOUCH THIS NUMBER MIKE INGLEHART". Ironically, the number has in fact been touched, since it was cut in half between the two games.

The kiosk demo of Mario Kart DS contained "Flesh Trucks" due to a spelling error. While the error was fixed in the final version, looking at the preview image for GCN Mushroom Bridge very closely shows that the truck still has an L. As such, the memory of the Flesh Truck remains.

Super Mario Bros. 3 contains a bizarre "vengeful Thwomp" glitch. Normally, if a Thwomp is hit by a hammer, it just dies. However, if a diagonal Thwomp is hit in the topmost position, it will perform a jump after dying just to get one last revenge attack in.

The manual for Wario Blast: Featuring Bomberman shows an extremely low level of effort regarding Wario illustrations. Despite Bomberman receiving various different drawings, only one artwork of Wario is used, which is repeated 19 times without any alterations.

According to the official British Nintendo Magazine System magazine, Panel de Pon was originally planned to be localized with Killer Instinct characters before being changed to the Yoshi-themed Tetris Attack.

Using a combination of glitches in Super Mario World, Yoshi can be taken into the final battle, where he can eat Peach upon Bowser's defeat. With Peach gone, the ending will not play, and Mario and Yoshi will simply stare at each other forever.

Experimental post: Do Me a Solid (Color) A collection of facts about instances of characters from Mario games becoming a solid color for various reasons, featuring e.g. the 21 Invalid Salmon Brothers and Backwards Blue Wario.

A 1986 Japanese guide on how to program using the Family BASIC software for the Famicom features many cute illustrations of Mario and Pauline (known as "Lady" in Japan at the time).

In Super Paper Mario, Mr. L is actually much smaller than Mario and Luigi, and gets scaled up at runtime. The game was originally developed for the GameCube before moving to Wii; Mario and Luigi received new Wii graphics while Mr. L was stuck with small GameCube textures.

An official Japanese 1988 guide for Super Mario Bros. 3 contains a small drawing of a Thwomp on the cover that, instead of the usual grimace, has a mischievous, cat-like expression. I have created a high-quality recreation of this Thwomp.

In 2D Mario platformers, Mario can either crouch or slide, but is denied the ability to sit in place. However, with a specific setup in Super Mario Bros. 3, Mario will come to rest in a sliding animation, finally allowing him to simply sit.

Extremely rare render of Kiddy Kong being created from a wireframe, seen in a 1996 Nintendo Spain product catalog.

An official 2005 guide for the presentation of Mario character illustrations, used internally at Nintendo of America, prohibits the modification of official artwork. Here are the examples of prohibited illustrations it lists.

In Mario vs. Donkey Kong, Polterguys are Shy Guys that turn into blocks. Due to the game's camera using massive amounts of foreshortening, they must compensate for it. To appear perfectly cubical, they are actually immensely long.

In Paper Mario: The Thousand-Year Door, Hooktail eats 8 Toads to recover health. The game ensures these sacrificial Toads always stay in order to be eaten in the end. They are Mario's biggest fans, will always show up, and no action can make them leave.

Super Mario RPG features Jinx, a miniboss noted for his small size. The prototype version of Mario & Luigi: Superstar Saga shows that he was planned to reappear in that game. Possibly to increase the comedic factor, he was made even smaller.

In Donkey Kong Bananza, demolishing all destructible terrain on DK Island reveals a shadow sphere that was hidden at the heart of the island. While the sphere is simply a darkness effect for the cave, it was clearly not intended to be seen like this and creates an ominous effect.

In Super Mario Sunshine, there is a scene of Shadow Mario turning into bubbles and entering a portal. However, zooming out the camera reveals he actually goes through the portal, upwards, into the air, past the boundaries of the skybox and into the dark void beyond, indefinitely.

Mario's and Bowser's New Year's resolutions, posted on Nintendo of America's official Facebook account in 2016.

In Super Mario 64, Koopa the Quick has a subtle "don't waste the player's time" mechanic. If Mario is too far ahead or has already finished, Koopa the Quick will hurry up and finish up to 30 seconds faster just to not make the player wait too long at the goal.

In Yoshi's "Loves Me...?" minigame in Super Mario 64 DS, there is a 1 in 4,294,967,296 chance to get 32 consecutive "Loves Me Not" results in a row. While this is astronomically unlikely to have ever happened, a player receiving those results would likely become very distressed.

The jump in storage capacity from Nintendo 64 cartridges to GameCube discs allowed the developers to be astonishingly generous with the storage in comparison. A Super Mario Sunshine cutscene of a single image fading in and out is larger than the entirety of Super Mario 64.

In Mario Party Superstars, the "endless mode" of Hot Rope Jump is not actually endless, and will play an ending scene after reaching 9999 jumps. This takes 3 hours of continuous flawless play, making this the longest Mario Party series minigame with a definite ending.

The municipality of Zaragoza in Spain contains a "video game neighborhood" that began development in 2010 with a street called "Avenida de Súper Mario Bros" and has since expanded to 10 streets named after various video game franchises.

By popular demand, I have recorded a full 2 loops of the 20 Green Berry music from Super Mario World, which can be found on the Supper Mario Broth YouTube channel! www.youtube.com/watch?v=Pvv9...

In Super Mario World, green berries increase the timer. By strategically eating them to make the timer pass 100 multiple times, the music can be sped up repeatedly. It turns out that the music engine cannot handle more than 20 speed-ups, and slows down to a crawl instead.

In the Mario Party series, an item's name was changed from "Cursed Dice Block" to "Creepy Dice Block". While it may appear to be an unnecessary change to make it more "family-friendly", it is actually an effective localization of the original Japanese name's double meaning.

The Nintendo Switch version of Captain Toad: Treasure Tracker contains a model of a realistic man, called "Male". Despite Male being from a Nintendo 3DS development kit, the Switch version is the only one he appears in.

In Donkey Kong Bananza, all Fractones refer to themselves as "we", suggesting a plurality or hivemind. However, there is one single random Fractone that says "I" instead. While this is likely an oversight, it makes it appear as though that Fractone broke free of the hivemind.

In Super Mario Sunshine, each plank of the Pianta Village bridge has separate collision for an unknown reason. This causes microscopic invisible gaps to form between the planks that extremely unfortunate players can slip through and die. Below is a compilation of such cases.

Experimental Post: Crump's Snack In a battle in Paper Mario: The Thousand-Year Door, Lord Crump runs backstage to seemingly eat a snack of 5 unseen items. I speculate on what his meal could have been, based on the amount of HP he recovered.

An official Mario Kart messaging app sticker contains a one-frame Easter egg. For a fraction of a second during the animation, Mario assumes the same pose he does on the Mario Kart DS box art.

There is a humorous error message in Paper Mario: Color Splash. When loading Luigi, the game does a quick "bone check" to see if his position is defined. If he fails his bone check, the developer console prints out "Luigi is elegal!!", likely a misspelling of "Luigi is illegal".

Official 2002 European Super Mario Sunshine screensaver that features Mario sliding across the screen and periodically turning into his famous "aggressive" render from that game.