The Lavender Town Syndrome (also known as "Lavender Town Tone" or "Lavender Town Suicides") was a peak in suicides and illness of foals between the ages of 7-12 shortly after the release of an obscure video game known as Ponymon Red and Green in the Griffin kingdom forty years earlier.

Rumors say that these suicides and illness only occurred after the foals playing the game reached Lavender Town, whose theme music had extremely high frequencies, that studies showed that only foals and young teens can hear, since their ears are more sensible.

Due to the Lavender Tone, at least two-hundred foals supposedly committed suicide, and many more developed illnesses and afflictions. The foals who committed suicide usually did so by hanging or jumping from heights. Those who did not acted irrationally complained of severe headaches after listening to Lavender Town's theme.

Although Lavender Town now sounds differently depending on the game, this mass hysteria was caused by the first Ponymon game released. After the Lavender Tone incident, the programmers had fixed Lavender Town's theme music to be at a lower frequency, and since foal were no longer affected by it.