:^)

Super Mario All-Stars contains a debug mode for Super Mario Bros. 3 in its code, which can be activated either deliberately by setting a single address in memory to a specific value (e.g. via a cheating device) or, curiously, by complete accident simply upon starting the console (as explained in my video here).

Two of the functionalities of the debug mode is the ability to swap between power-ups at the press of a button, and the ability to enter "free movement" mode whereby Mario slides freely around the screen in all directions instead of needing to walk.

If the free movement mode is activated while Mario is in specific animations, and then the power-up is changed during it, his sprite may become jumbled. While normally, the sprite simply changes to other parts of Mario's sprite sheet, a particularly amusing change occurs when swimming as Frog Mario and then swapping to Fire Mario while in free movement. This will make Mario assume a big "25" graphic alongside bits and pieces of his body.

Source: IgorOliveira66X

Players of Super Mario Advance may recall that one of the major changes in that game compared to the Super Mario All-Stars version of Super Mario Bros. 2 (on which it is mostly based) is the inclusion of two new boss intros for Fryguy and Clawgrip, respectively.

In both cases, the action stops and a cutscene shows four bubbles (identical to Wart's bubble attack) float up from the bottom of the screen and surround an entity before transforming it into the boss (a mask for Fryguy and a small Sidestepper crab for Clawgrip).

The game actually contains two unused scenes for the same intro happening with two more bosses: Mouser and Tryclyde, shown restored in the footage. Mouser is created from a unique small mouse sprite, while Tryclyde is created from a Cobrat.

This implies that during the game's development the idea of Wart's magic being responsible for most of the game's bosses was more prevalent, before these scenes were scrapped for an unknown reason.

Source: AkiraTheGamer

OP: "Decarbonized formaldehyde is great. Just wash daikons with decarbonized formaldehyde and they turn white."

"Decarbonized formaldehyde" (脫碳甲醛) is an online phrase used to make fun of people that blindly avoid chemicals. Formaldehyde (H2CO) decarbonized is water (H2O).

In Super Mario Sunshine, a commonly known glitch is the Dune Bud high jump, whereby a Dune Bud on Gelato Beach is sprayed and then Mario performs a Ground Pound in such a way that he is in mid-air when the Dune Bud activates. This results in Mario being launched so high up into the air that he takes several minutes to fall back down.

However, an interesting interaction of this glitch that actually reveals some of the inner workings of this game can be seen when it is performed directly after defeating the Wiggler boss, immediately before the Shine Sprite spawns. This is shown in the footage; note the unusual black sky during the cutscene.

The reason for this is that the skyboxes in this game (as in many other Mario games like Super Mario Galaxy) actually follow Mario instead of remaining fixed in space. When Mario is launched into the sky, the skybox follows him, so when the camera switches to showing the Shine Sprite, the sky is no longer visible from the ground, having been pulled upwards by Mario.

Source: linky628

Top: the snowy ground texture in Cool, Cool Mountain in Super Mario 64 is blurry and yellowish, not recognizable as anything specific.

Bottom: it turns out that it is actually a stock proto of a blanket from a commercial texture CD, made more blurry and recolored. Interestingly, the original blanket's color would also have fit for the purpose of making snowy ground, but the color was likely introduced to give some visual variety to the environment and to keep all ground in the course from being some shade of light blue.

Source: Render96, Leonard85026417