 The level is identified in the internal memory as "World 36-1," but when it tries to display this, 36 is replaced with a blank space.The reason the glitch occurs is because of a misread byte.The Japanese version of the game on the Famicom Disk System has a different result from performing the glitch; instead of looping after Mario reaches the end of the level, it goes through three different levels until players reach the goal and the game ending.