All of these Pokemon noobs talking about Nintendo DS glitches and underground stuff, to young to know... The buried alive glitch was part of the original Red and Blue Pokemon games on the gameboy. This feature ended up being left out of the final games but has still been accessed by methods I am not aware of. It took place in Lavender Town at the top of the tower. Buried Alive was supposed to be the boss of the tower. When you reached the top although you could not see anyone there, after reading clicking on a head stone a conversation would be started followed by a battle with Buried Alive. In the battle he had the appearance of a decaying human corpse trying to crawl its way out of the ground. He has been programmed to have two White Hands, a Gengar, and a Muk. Although they never programmed anything to happen when defeating him (the game would just freeze) if you loose the battle the Buried Alive was to have stated, “Finally, fresh meat!” followed by several lines of gibberish. He was to have then dragged the player character into the ground surrounding him. The scene would finish with a typical “Game Over” screen; however, in the background, an image of the Buried Alive character devouring the player was to have been shown. Source
Read this for the White Hand glitch. Ugh, so scary.