Coraline has been traumatizing young children since its release in 2009, but the animated children's horror film gained a cult following that very same year. Even 14 years after its initial release, Coraline continues to inspire countless discussions, comparisons, theories connecting it to horror icons like Stephen King's It, and is arguably the best children's horror movie ever made. While people of all ages can enjoy the creepy horror that is Neil Gaiman's Coraline, the fact that it's a children's movie with a PG rating actually hinders Coraline from reaching its full potential as a supernatural horror movie. With a more adult rating, Coraline could've been the best animated horror film of all time. Some argue that Coraline already pushes well past its PG rating and intended audience due to its explicit exploration of dark themes like sacrifice, torture, and murder, so changing the rating could've given the movie the space it needed to fully come into its potential.
Source：https://www.cbr.com/coralines-pg-rating-stopped-it-from-being-the-best-animated-horror-movie-of-all-time/
