Previously I have posted about a Nintendo of Europe downloadable premium animated wallpaper that featured a bizarre Toad eating the wallpaper. The files have finally been datamined, allowing the Wallpaper-Eating Toad to be observed in never-before-seen maximum quality.

In Super Mario Galaxy, the Major Burrows boss was not tested very well in 2-player mode. If the P2 cursor is used to make the player jump too high, his position will desync from the ground and he will float angrily and unmovingly through the air.

Under very specific circumstances that are still plausible to occur during regular gameplay, Paper Mario: The Thousand-Year Door will undergo a "Mario Running Forever Softlock" whereby Mario will run in place eternally instead of ever starting his turn.

As mentioned in the video (I apologize for not including a visual), it is the slide course accessed via this pipe in Delfino Plaza. However, the top of the Pachinko course has the same property, though it much harder to reach! I hope this can be of interest!

Exclusively in the Japanese version of Super Mario Sunshine, there is a physics oversight on a platform in a secret course whereby Mario will be stuck on the ground producing dust. The steam-like dust visuals and sound effects make it seem like he is being fried or grilled.

In the Nintendo Switch Online version of Mario Party 3, Daisy's happy winning expression was changed to a more serene/confident one. This is the only expression that was changed. It is unknown if this is a glitch or if the developers believed it to better express her personality.

Unique Mario voice lines by Charles Martinet recorded for a 2009 soundboard on Nintendo's Australian website, including lines like "I love Australia!", "I love the propeller hat!" and "Ah, spaghetti, meatballs, and pizza pie".

In Super Mario 64, tiny slivers of exposed out-of-bounds areas will cause Mario to bonk if he collides with them. However, the exact same scenario in Super Mario Sunshine is much more cruel to Mario. Here, instead of merely bonking, Mario will break his spine.

Sound Fantasy was a cancelled SNES game that would have used the SNES Mouse to draw pictures to turn into sound, like a musical Mario Paint. A prototype of it surfaced in 2015. One of the sample images is this unique illustration of Mario that plays the Happy Birthday song.

Experimental post: The Duality of Whacka In the Switch version of Paper Mario: TTYD, Whacka can finally be fought, and has a suspiciously specific 108 HP. The game both offers a ridiculously simplistic explanation for this as well as a complex one steeped in Dharmic symbolism.