Graffiti

Graffiti is a substance closely related to goop that first appeared in Super Mario Sunshine. It is a paint-like substance painted on various surfaces by Bowser Jr. using his Magic Paintbrush. Unlike regular goop, graffiti is typically harmless on its own, but it can have various other effects.

Super Mario Sunshine
In Super Mario Sunshine, graffiti is usually painted on walls, though it also appears on other flat surfaces. Mario can clean it off surfaces by spraying it with water using FLUDD, and he must do so all at once, or the graffiti regenerates once he stops spraying. It is most commonly seen in the form of M Graffiti, plain red paint in the shape of Shadow Mario's distinctive M signature, which also appears in the game's opening titles and is painted by Shadow Mario using regular goop on the Delfino Airstrip and in Delfino Plaza, as well as with burning goop in Pianta Village. Rainbow Ms also resemble M Graffiti, and they are painted by Shadow Mario in Delfino Plaza. M Graffiti varies wildly in size, with most being roughly the same length as Mario's height but sometimes appearing slightly smaller or much larger, with a single M Graffiti covering a large portion of Pianta Village during its third episode, The Goopy Inferno. Cleaning M Graffiti usually rewards Mario with a Blue Coin, except for the two M Graffiti painted on water tanks on the Delfino Airstrip, which reward Mario with standard coins instead. These M Graffiti are also the only graffiti in the game that reappear if Mario revisits the area.

Along with M Graffiti, graffiti also appears in the form of various paired symbols, known as Paired Graffiti. The symbols that appear are "×" (called X Graffiti), "○" (called O Graffiti), and "△" (called Triangle Graffiti). Like M Graffiti, Paired Graffiti is usually drawn in plain red paint, though Ricco Harbor contains dull green Paired Graffiti as well. Unlike M Graffiti, Paired Graffiti always appears in a consistent size, being roughly the same length as Mario's height. When Mario cleans an instance of Paired Graffiti, a Blue Coin appears at the location (or former location) of the other symbol of the same design in the area, which Mario has a limited time to collect. If Mario does not collect the Blue Coin in time, it disappears, and the graffiti he cleaned off reappears. He must then backtrack and clean the same graffiti a second time to make the Blue Coin appear once again. Two Blue Coins are obtainable for each pair of Paired Graffiti, one for each individual symbol.

Black graffiti is also used to deface the Shine Gate's Shine Sprite effigy as well as the bells inside Delfino Plaza's two bell towers. Mario can earn a Shine Sprite each for cleaning the graffiti off the Shine Gate's effigy and each of the two bells.

Super Mario 3D World + Bowser's Fury
Graffiti reappears in the Bowser's Fury campaign of Super Mario 3D World + Bowser's Fury. In the introductory cutscene of the campaign, Mario comes across a black M Graffiti that transforms into a portal, taking him to Lake Lapcat. Throughout the islands of Lake Lapcat, ?-shaped graffiti appears on various walls and surfaces. When Bowser Jr. joins Mario, he can use his Magic Paintbrush to create other graffiti art in these spots, yielding a reward once complete. While painting, he produces paint colored and textured similarly to electric goop. In single-player mode, the player must either use the touch cursor or press when next to a graffiti spot to send Bowser Jr. to investigate. In multiplayer, only the second player can paint graffiti by approaching a graffiti spot and pressing. Once a graffiti spot has been painted, it shines briefly before the shine fades. The art remains in place of the ? mark permanently, but if the current save file is reloaded, the art appears in black and white. If Bowser Jr. approaches the spot again, he repaints the art in color, producing the same effect.

List of graffiti
The golden pipe in particular can be destroyed by Plessie, and if removed this way, it does not reappear until the current save file is reloaded. If entered, the pipe takes Mario to a bonus room filled with coins that he can use to add power-ups to the item storage. While the Warp Pipe can be reentered, the coins do not respawn until the save file is reloaded.