1951
Mario and Luigi's celebratory pose after completing the story mode in Mario Teaches Typing 2.
1952
Shigeru Miyamoto with a Mario toy from the British Superplay magazine.
1953
Artwork of Blooper from Mario Tennis Aces uploaded by Nintendo to their official LINE account. The artwork is presented as having been drawn by the account's green Toad mascot, Kinopio-kun.
1954
Unlicensed Yoshi plush toy. Judging by the shape and inscription, it likely is intended to represent a Nintendo DS stylus with Yoshi sitting on top of it.
1955
Luigi possessed by an evil spirit, from a Japanese Mario activity book. Although the book predates Super Paper Mario and its "Mr. L" role for Luigi, the same idea of mirroring the "L" emblem on Luigi's cap to indicate an abnormal antagonistic state is used.
1956
Whenever Mario travels via the Cheep Blimp in Paper Mario: The Thousand-Year Door, a small version of Glitzville is seen from far away (top). Zooming in, we can see that the small signs were not localized and display the Japanese names "Urontown" and "Fresh Juice Uron" (bottom).
1957
By comparing different visible parts of the tagline in Super Mario Sunshine covers in different regions, we can reconstruct the full tagline as "Mario Has More Moves Than Ever And You'll Have To Master Them [To Spray] (Europe) / [All To Sprinkle] (US) Water In The Sunshine!"
1958
Outside and inside of Super Mario Travel, a small store selling Mario-themed travel gear which was set up temporarily in 2018 inside the Shibuya Loft mall in Tokyo, Japan.
1959
Geriatric Mario, Luigi and Yoshi seen in a manga about Mario in the year 2059, released by Enix Corporation (later part of Square Enix).
1960
This photo of Jim Merrick, former senior marketing director at Nintendo of Europe, seems to be focused not on Mr. Merrick, but on a unique Yoshi statue behind him. If you have any information regarding the current whereabouts of the statue or additional photos of it, contact me.
1961
Photo of Koji Kondo taken while he was composing the Super Mario World soundtrack in 1990.
1962
Artwork made in Mario Paint depicting a Yoshi-colored T. rex, from Nintendo Power's official guide for Mario Paint.
1963
Thwomp from Wario's Woods: Burst of Laughter Version for the Satellaview, a special edition of Wario's Woods that replaces many of the graphics in the game with caricatures of Japanese celebrities.
1964
The control explanations in the manuals for all games where Mario is the player character are phrased either as e.g. "Move right" or "Mario moves right". The only exception is Donkey Kong for the NES, where the controls refer to Mario as "He" instead.
1965
In Super Mario Bros. 3, the faint outlines of items in the sky in Level 1-1 are randomly generated every time the level is entered.
1966
In Mario Party 7, several polygons in Birdo's eyes are missing, creating holes that can be seen through. This is the only time in the Mario Party series that a character's model is incomplete in this manner. In total, 10 polygons are missing, resulting in 4 distinct holes.
1967
During the event in Chapter 7 of Paper Mario where Mario must tell Bombette apart from imposters, a shadow can be seen on the floor behind Mario. That shadow belongs to the actual Bombette, who is still following Mario around; merely made invisible as a development shortcut.
1968
Earlier today, I have made a post that contained an erroneous translation from Japanese. I have deleted the original Tweet in accordance with my veracity policy. Below is an explanation of the situation. I apologize for the error and will take steps to prevent it in the future.
1969
Unused enemies found in the data of Mario & Luigi: Paper Jam: a Paper Stingby as well as black and gradient green Paper Goombas. In the finished game, all paper enemies are taken from Paper Mario: Sticker Star; the Paper Stingby would have been the only entirely new enemy.
1970
In Paper Mario: The Thousand-Year Door, the sprites of characters are layered in such a way that their face is only visible from the front. (Top: typical back view of characters.) The only overworld NPC with a double-sided face is the Lakitu reporter from Glitzville (bottom).
1971
Set of unlicensed Mario keychains. Note that Yoshi is either a) using a Boo item while not inside a kart, which has not yet been possible in any Mario game; or b) simply holding a very small Boo.
1972
The 2004 book "How to Draw Nintendo Heroes and Villains" refers to Bowser as "Kerog".
1973
Cartridge art and title screen of "Mali & Lugi Fighting 2", an unauthorized hack of Chip 'N Dale: Rescue Rangers 2 for the Famicom with Mario graphics. The artwork is taken from the cover of the 1993 Super Mario Compact Disco official music album.
1974
In Super Mario Galaxy 2, Lubba usually has a mouth, which is visible in all official art and during normal gameplay (left). However, going into first-person view around Lubba makes his mouth completely disappear (right).
1975
Japanese toy of Winnie the Pooh dressed in an outfit strongly resembling Wario's. While it appears to be a licensed Disney product, the packaging indicates no Nintendo license, meaning that the Wario reference is unauthorized.
Additional obscure Mario content for suppermariobroth.com.
Now on Patreon: patreon.com/suppermariobro…