1876
Normally, it is not possible to enter the Chief Chilly Challenge extra course in Super Mario 64 DS as Yoshi. However, bringing Yoshi to the Chief Chilly battle through the use of hacks or glitches reveals that Chief Chilly has special unused dialogue for this occasion.
1877
The final level of Mini-Game Island in Mario Party has the player compete against Toad in the Slot Car Derby game. If Toad wins this game, the screen fades out without a message. However, hacking the game to remove that effect reveals that Toad's victory message is "ALL WINS!"
1878
In Donkey Kong 64, there are books on the shelves in the log cabins in Crystal Caves. The covers of all these books read "Monkey Book of Science, by M. Nuts". Due to the very dim lighting in the cabins, these are hard to see; I have increased the contrast in the image.
1879
Cartridge label design for Super Mario Land DX, an unauthorized hack of Super Mario Land.
1880
Unused "Yoshi Nozzle" found in the data of Super Mario Sunshine. It replaced FLUDD's head with a Yoshi head and would have presumably had some sort of licking functionality.
1881
Behind-the-scenes photo taken during the process of creating the Mario mascot head for the costume used in the North American commercial for Mario Party 5.
1882
Illustrations of Candy Kong in her Donkey Kong Country TV show design beating up various Kremlings and King K. Rool, from a set of Japanese Donkey Kong trading cards.
1883
Concept art of Bowser in a military-themed outfit for his appearance in Skylanders: SuperChargers. He appears to be wearing a Star Coin from the New Super Mario Bros. games as a medallion.
1884
The Skulking Around museum level in Yoshi's Crafted World contains a somewhat hidden exhibit: an armless Yoshi statue that can only be seen when the intruder alarm is active. By targeting its plaque, the camera will focus on it. It can also be seen from behind on the flip side.
1885
Professor E. Gadd's questionable view of morality, as seen in Mario & Luigi Superstar Saga + Bowser's Minions.
1886
In the first mission of Pianta Village in Super Mario Sunshine, three Chain Chomplets must be brought to a pond, where they will burrow into the sand (top). However, the ground in that spot is so thin that they burrow through to the underside of the village (bottom).
1887
In the Super Mario All-Stars version of Super Mario Bros. 3, the Fire Flower has eyes under nearly all circumstances. However, receiving a Fire Flower from a Toad House briefly shows it with its eyes missing. It is the only object that changes its appearance in this manner.
1888
The 1999 PlayStation game 40 Winks mentions Mario on its North American cover, as it prominently displays the quote "Move over Mario..." from Nintendo Official Magazine. The magazine in question reviewed a Nintendo 64 copy of the game that ended up not being released.
1889
Textures used for the Thwomps' facial expressions in Mario Kart 64. Note that the caged, seemingly green Thwomp in the Bowser's Castle course actually uses the same blue textures as the other Thwomps, and is merely lit with stark yellow lighting to appear green.
1890
Promotional photograph of Shigeru Miyamoto with a Donkey Kong and a Mario amiibo, from Edge Magazine.
1891
In Super Mario Bros. 3, certain environments cause Fire Mario's fireballs to assume different palettes. During all Koopaling battles, they become white with a light blue outline (left). Inside Toad Houses, they become green with a black outline (right).
1892
According to the manual for Mario Party, Luigi is smarter than Mario.
1893
Prerelease screenshot of Super Mario 64 featuring a beta Pokey design.
1894
Image used on the main menu of a rare Best Buy-exclusive Super Mario Sunshine preview CD-ROM.
1895
The Midas River minigame in Super Mario RPG contains a river background that scrolls diagonally. In the game's data, it is saved as a square image with several rivers that uses screen wrapping to appear as one uninterrupted river (explanation in image).
1896
In Paper Mario: TTYD, entering a building and then clipping back out lets Mario walk around the area with most graphics unloaded, but the collision still present. Talking to NPCs will make the tail of the speech bubble point at Mario, making it appear as though he was speaking.
1897
Unused model of Mario found in the files of Pikmin. The model is notable for giving Mario a brown-colored, rather than black, mustache and adding folds and creases to his clothes that are not present in this magnitude on even his most detailed models to date.
1898
In the earliest Japanese version of Super Mario 64, there are four arrows floating around the top of a pole in Rainbow Ride. These resemble arrows displayed when positioning items in a level editor and may be a remnant of the level design process.
1899
Top: cartridge art for an unauthorized copy of Super Mario Bros. 3 for the Famicom. The artwork is an edited version of the Japanese box art (bottom left) with Mario being replaced by a Blooper wearing a wizard hat. A close-up of the Blooper is provided in the bottom right.
1900
One issue of the Spanish Hobby Consolas magazine contained a holographic Super Mario Bros. 3 sticker. Unfortunately, the printing method used to achieve the holographic effect did not lend itself to being scanned, resulting in all known scans of the sticker appearing like this.
Additional obscure Mario content for suppermariobroth.com.
Now on Patreon: patreon.com/suppermariobro…