Go to the bridge in the darkworld on Death Mountain. Now at the top pillar, stand directly underneath it. Stand as close to the the pillar and as close to the wall as possible and face right. Teleport to the light world, and try to move one pixel forward. You shouldn't teleport back if you did it correctly. Don't move, or you'll have to do it all over again. Teleport back to the light world, and go directly right until you stop at the pillars. Pull out your sword, charge up, and move slowly right until you hit the portal. If you teleported back, you went too fast, so you must restart the glitch. But, if you made it, move right and you should jump down into the void, but be standing. Now you can explore, or you can go south, and appear in a waterfall, trees, or a ledge. If you appear on a ledge, which happens most often, jump down and you will be back on land, at an area you can't get to unil later. If you land on trees, or a waterfall, press select, save and quit, and try again.
Submitted by: Thor