Skreemers were ghostly, green creatures who allied with the Ghost Warriors. If they attached themselves to a human's head, the human would temporarily turn into a ghost. They are also capable of turning objects they hit invisible, with a ghostly green color.
After being summoned by Morro with the Allied Armor of Azure, Soul Archer fired a Skreemer at a sign with his bow. Later, when Ronin escaped with the Scroll of Airjitzu, Soul Archer fired a Skreemer that attempted to chase Ronin, but he ends up using a sign to protect him.
In the Samurai X Cave, Soul Archer fired a Skreemer at Nya's Samurai Mech, but Ronin fires an Aeroblade to destroy it. Later, when Nya and Ronin were cornered by Morro, Soul Archer, Bansha and Ghoultar (in the Mech-enstein), the Soul Archer tried to fire a Skreemer at them, by stopped when it started to rain.
As the ninja climbed the Wailing Alps on Zane's Titan Mech, Kai was shot with a Skreemer by Soul Archer; however, because Kai was wearing Deepstone, he was not possessed. Later, Soul Archer fired a Skreemer at a bridge, forcing the ninja to quickly cross it.
Soul Archer fired a Skreemer which targeted Jay's sled. It missed the first time, but turned back around to try and hit Jay again. However, it managed to hit a nearby log instead.
Morro used the Realm Crystal to open a portal to the Cursed Realm, unleashing many Ghost Warriors and Skreemers to take over Stiix. Some Skreemers can be seen eating food alongside the many Ghost Warriors.
After the Preeminent was unleashed, the Ghost Warriors and Skreemers assisted her in their invasion. After Nya unlocked her True Potential to completely drown the Preeminent, all of the other Ghost Warriors were destroyed too, including Skreemers.
Skreemers are low-level ghosts from the Cursed Realm. Fast, but not very bright, they are pure ghostly energy. Their touch can temporarily turn someone into a ghost. They got their name from the fact that they scream loudly as they fly. Morro often flies into battle with multiple Skreemers backing him up.[link unavailable]
- The Skreemers' appearance is most likely based on Slimer from the Ghostbusters franchise. The Skreemer pieces were also used in the Firehouse Headquarters set from the Ghostbusters line. The pieces were recolored in medium transparent blue and transparent pink for the Blue Ghost and Pink Ghost, respectively.
- A few Skreemers also hold food pieces in the sets, possibly a reference to Slimer being able to eat food.
- Skreemers are able to fit on a Minifigure head.
- Their name is a respelling of "screamers."
- The Skreemers did not make a true appearance until the final two episodes of Season 5. Up to that point, their head had appeared on Soul Archer's arrows.
- Like the rest of the Ghost Warriors, Skreemers had voracious appetites, though with the Skreemers this is only seen in the sets where they always carry a type of food.