The Undead are one of the many creatures of Gravity Falls, Oregon. According to the "Creature #6" next to its name, it can be deduced that it is the sixth creature to be written about by the author. It is said that due to their pale skin and bad attitudes, they are often mistaken for teenagers. Initially thought to be invincible, they can be destroyed by singing a three part harmony.
At some point before the events of the series, Ford came across and studied them, recording their powers, appearance, and weaknesses in Journals 2 and 3. He discovered their weakness as a result of a barbershop quartet playing on the radio.
In "Scary-oke" Dipper, in an effort to prove that the information in Journal 3 is real to a pair of government agents, foolishly summons a hoard of zombies that subsequently attack the Mystery Shack. Later in the episode, it is discovered that the zombies' weakness is a three part harmony which would shatter their skulls. So Dipper, Mabel and Stan sing to defeat them. It is later revealed that there is a cure for zombification (involving cinnamon and formaldehyde), which is used on Soos, who had turned into a zombie after being bitten by one.
In "Dipper and Mabel vs. the Future," Stan complains that he is still finding pieces of the undead under the cushions after "that zombie incident" in "Scary-oke."
In "Weirdmageddon 3: Take Back The Falls," after Weirdmageddon ends, zombies try to rise from the graveyard behind the Valentino family's funeral home, but are subdued by Mr. and Mrs. Valentino. The corpse of Mayor Befufflefumpter is among them, grabbing Mrs. Valentino's leg.
- 201. "Scary-oke"
- 202. "Into the Bunker" (mentioned)
- 211. "Not What He Seems" (mentioned)
- 217. "Dipper and Mabel vs. the Future" ( )
- 219. "Weirdmageddon 2: Escape From Reality" (pictured)
- 220. "Weirdmageddon 3: Take Back The Falls"
- Many of the zombies found in Gravity Falls were lumberjacks that died in the Great Flood of 1863.
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