Ok, we all know about the Minus World in Super Mario Bros. It leads you to a never-ending water level. BUT, I bet you didn't know that the
Japanese version of Super Mario Bros. leads to something DIFFERENT! Yes, that's right, the Famicom Disk System version of Super Mario Bros. has the Minus World; heck, you even do the same process to get there. This version of the Minus World, however, is much different compared to the NES version. In fact, the Japanese Minus World is THREE LEVELS!

Play Level 1-2 until you reach the horizontal green pipe at the end. Break the 2^nd and 3^rd blocks from the wall. Stand on the edge of the pipe facing away from the wall -- jump up and to the right. The goal is to reach the corner of the block that wasn’t broken. When pulled through the wall, go down the 1^st pipe before the screen stops scrolling.

So now you've done the whole process, right? Well, Level 1 of the Minus World is exactly like World 1-3 in Super Mario Bros., with the flying fish. Easy, right? Get through that, and you go to a swimming version of World 2-3! Yes, now Mario SWIMS in World 2-3, with weird sprites all around! King Koopa shows up out of nowhere, but he doesn't even attack you! Even the Princess shows up. MAKE SURE WHEN YOU REACH THE FLAG, YOU TOUCH IT AT THE BOTTOM! I've heard horror stories about people who reach the top of the flag, then Mario never enters the final level.

The final level is interesting, indeed; it's a hacked version of an underground King Koopa level! There's lots of enemies, including fast Piranha Plants and tons of annoying mini-glitches. There's even dead ends! Weirdest yet, THERE'S NO KING KOOPA! You just hit the axe, win, and a GREEN TOAD thanks you! Then you go back to the title screen.

Try it out!