The Ghoulest Island

The Ghoulest Island refers to a Halloween version of The Coolest Island whenever it's Halloween time and it's a tradition in the series.

Trivia

 * The Ghoulest Island first appeared as a holiday special on The Coolest Island's Instagram account in 2016, and then it became a full holiday special on the comics and the series in 2017 and is on-going every Halloween.
 * The comics are dubbed "The Ghoulest Island Comics" whenever The Ghoulest Island starts or is going.