Shirt given out to Nintendo of America employees involved in 2001 manufacturing operations. While the screaming Luigi is referencing Luigi's Mansion being released that year, the logo inadvertently makes it look like 2001 manufacturing operations was a harrowing experience.
In Super Smash Bros. Melee, all fighters' default poses are a standard T-pose with arms out and open eyes, except for Yoshi. He has a unique default pose that gives him lowered eyelids that result in a smug or satisfied expression.
Most of the footage of the famous 2000 "Super Mario 128" tech demo was recorded with handheld cameras by the audience, with the presenter drowning out the game sound. Only 10 seconds of direct feed footage exist, which reveal that the sound was a cacophony of Marios screaming.
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.
Grinch: I would like to buy a dog
Pet store employee: ok are you a guy?
Grinch: No. I am some sort of gorilla
Pet store employee: That is fine.
Grinch: A green gorilla
Employee: Doesn’t matter
Mario Kart: Double Dash contains a bizarre "eternal European pain" glitch whereby being burned when entering a pipe will cause the character to remain in pain indefinitely, but only in the European version.
The Mario Party box can very easily be mistaken for the Mario Party 3 box due to the large and prominent 3 on the Dice Block on the cover. As it turns out, not even Nintendo themselves are immune to this, as this mistake was made in an annoucement post for Mario Party 3 on NSO.