Undead

The Undead or zombies are menacing paranormal creatures that can be summoned in Gravity Falls. Dipper Pines accidentally summoned a hoard of them to prove the Federal Agents that his Journal is real. Originally the book says that Zombies has no weakness, but written in invisible ink, it states that it is possible to defeat them with loud song that can shatter there skulls and return them to dead. With this new information they song a court song and destroyed the zombie hoard.