Warp Pipe

From SMWiki

A Warp Pipe is a common item in the Mario universe. Even though every pipe in the Mario universe in considered a Warp Pipe, only some are used to transport a creature from one point to another point. In many cases, Warp Pipes can be used to cross great distances (and even worlds), instantly. The size of Warp Pipes can vary, with some being too narrow for Mario to enter. They are traditionally green, but have appeared in many colors in lesser numbers over the years. Warp Pipes are also commonly used as homes for Piranha Plants and some Lakitu. The behavior of pipes can also vary, with some even expanding and contracting.

Hacking Information

• An exit enabled pipe in a screen without a designated screen exit will send Mario to Level 0 or Level 100, depending on the level number. Levels 0-FF will send Mario to Level 0, while levels 100-1FF will go to Level 100.
  • This is because in the original unedited game, only double digit level numbers could be linked to each other, and be on the main OW map, while only triple digit levels could be linked, and be on the submaps. Lunar Magic installs an ASM hack to circumnavigate this.
• If you enter a pipe (or door), $141A (which is set to zero at OW -> level) will increment by 1. It does that every time you enter one. If you do this 256 times in one level (which isn't exactly likely to occur, but it's still very possible), then at the 256th time, you will warp back to the very start of the level. (The level will thus reload.) A fix for this glitch is known. You have to hijack $00D273 and change INC $141A to LDA #$01 STA $141A.