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Skreemers are antagonists that appear in the fifth season of LEGO Ninjago: Masters of Spinjitzu. They are ghostly, green creatures who ally themselves with Morro and his warriors. If they attach themselves to a human's head, the human will turn into a ghost.
Skreemers like the rest of the ghost warriors also have voracious appetite, which is notably seen in the sets; they always carry some form of food or another.
The Skreemers did not make a true appearance until the two final episodes of Season 5, up to that point their head had appeared on the Soul Archer's arrows.
- The only way to deal with them is by using the Ghost Trap as either Peter Venkman, Egon Spengler, Raymond Stantz, Winston Zeddemore, Abby Yates, Erin Gilbert, Jillian Holtzmann or Patty Tolan.
- Despite being Ninjago characters, they have only appeared in Ghostbusters levels.
- A Skreemer appears as a part of one of Raymond Stantz's idle animations.