Big Boom Mountain

Big Boom Mountain is an unused level that can be found in several prototype builds of Mario 64. According to several developer and eyewitness accounts (from personalized copies) it appears to be a level that is similar to Bomb-omb Battlefield, with the feeling of Lethal Lava Land. After traversing through several puzzles and such located all throughout the level, you begin to travel up the large volcano in the center of the level. After traversing to the top, you come across a large Whomp, which gives some general dialog that has not yet been documented. Several sources say it is the following, "Ah, I see you've found me Mario! Well, jokes on you, I'm prepared to destroy you! Well... once I melt into this rock and become the Molten King! Bwahahaha!" At which point the Whomp spins faster and faster, before going going down into the ground. The ground rumbles, and then a large mass of molten rock shoots up into the sky and falls down onto the battle arena. It pops eyes out, and the battle sequence begins. Mario must stomp on the large creature 3 times. There is no documented footage or firsthand experience of what happens afterwords, as the game always crashes after this fight.