The Lavender Town Syndrome (also known as "Lavender Town Tone" or "Lavender Town Suicides") was a peak in suicides and illness of children between the ages of 7-12 shortly after the release of Pokemon Red and Green in Japan, back in February 27, 1996.
Rumors say that these suicides and illness only occurred after the children playing the game reached Lavender Town, whose theme music had extremely high frequencies, that studies showed that only children and young teens can hear, since their ears are not fully developed.
Due to the Lavender Tone, at least two-hundred children supposedly committed suicide, and many more developed illnesses and afflictions. The children who committed suicide usually did so by hanging or jumping from heights. Those who did not acted irrationally and complained of severe headaches after listening to Lavender Town's theme.
Although Lavender Town now sounds differently depending on the game (the song had to be edited before North America and other Countries would allow it to be produced as Red & Blue versions), this mass hysteria was caused by the first Pokemon game released---the programmers had to fix Lavender Town's theme music to be at a lower frequency, so that children were no longer affected by it, even though some tried to argue the high frequencies could not be heard via the Gameboy Speaker system and might only be heard if head-phones were used.
One video appeared in 2010 using a "special software" to analyze the audio of Lavender Town's music. When [1]played, the software created images of the Unown near the end of the audio. This raised a controversy, since the Unown didn't appear until the Generation 2 games: Silver, Gold, and Crystal. The Unown translate to GET OUT,
{Please watch video below to see the missing frquencies mentioned above.}
There is also the said Beta Version of Lavender Town.
It is said that the Beta Version of Pocket Monsters was released to some kids to test the games but it is still unknown and un-recorded what occured during these specific testings and if these children suffered from what we now call: Lavender Town Syndrome.