If you're reading this right now that means you either made it out of Pokemon Red alive, or you've never been to Lavender Town.
"Lavender Town Syndrome" is rumored to have caused a string of suicides and related cases of clinical depression in children ages 9-12, after the release of Pokemon Red and Green in Japan in 1996. The syndrome was said to be a result of the high frequencies in the music that plays while you are in the region of Lavender Town.
Listen for yourself [Disclaimer: this music is not nice.]
Allegedly after the Lavender-Tone incident, programmers went back into the game to change the frequency of the music. Of course this Creepypasta is probably just a fictional story designed to freak out kids and those who've played the game.
...but then again, after listening to the music myself I do feel a little sick..... how about you?