Nightmare Fuel / Super Robot Monkey Team Hyperforce Go!
Are you scared yet? No? You will be.

It's a show about robotic monkeys. It also has a horrific Eldritch Abominations at every corner and plenty more terrors.

  • In one episode which parodied The Wicker Man (1973), there is a secret society worshiping the bad guy who you can see the organs of, and two of its main members are a sweet couple who had been around for four seasons before this came up.
  • The episode with Wonder Fun Meat World, which featured strange meat that caused odd rashes and is addictive. And their mascot is really an Eldritch Abomination who ate humans and could stand up to the Super Robot. It vomits humans when defeated.
  • Planetoid Q provides many examples of nightmare fuel with its plot centered around the team having to journey into the body of a living planetoid. Its body is one long Womb Level filled with parasites and monsters at every turn. Some of which have eyes and mouths with razor sharp teeth. As the page image will attest. The Planetoid itself was tricked by Skeleton King into colliding with Shuggazoom in a manner similar to Majora's Mask with a complementary Slasher Smile for extra creepiness.
  • The episode with Gyrus Krinkle, an expy of Norman Bates, in a kids show.
  • The most terrifying episode of all however, has to be I, Chiro, especially when he gets possessed.
    • "I, Chiro". Good grief, "I, Chiro"…
    • THE ENTIRE SECOND HALF OF "I, CHIRO". When it's not a Tear Jerker, it's this.
  • The Skeleton King can be really scary sometimes, usually when he's mistreating his servants. And having Mark Hamill do the voice is part of the equation.
  • The three-headed Monster Clown from the Circus Episode.
    • Don't forget the Ringmaster's One-Winged Angel form in that same episode, complete with black ooze dripping out of his eyes and mouth. *shudders* The fact that he's voiced by Freddy Krueger himself does not help.
  • The fact that the series ends on a cliffhanger. Meaning ol' Skeleton King is a Karma Houdini since he finally goes head-to-head with the Hyper Force and their allies while not being shown to lose.
  • The episode which plays homage to H.P. Lovecraft with a Cthulhu Expy that's revealed to be Skeleton King's eye.
  • Skeleton King worm.
  • Master Zan's true form from Antauri's Masters.
  • Skeleton King creates this in-show for the team in In The Grip of Evil.
  • Oi, several episodes were Nightmare Fuel, Circus of Ooze anyone?
    • Pretty much half the final season. Lesse... Secret Society for starters. Then Fire of Hate/Soul of Evil. I mean, between Sprx, the resurrection ritual, and Skeleton King's new look? Good grief.
      • Don't forget Incident On Ranger 7, Ghosts of Shuggazoom, and Demon Of The Deep.
  • The Probe from Ghost in the Machinder.
  • The Skeleton King Droid. Relentless, brutal, and nigh invulnerable. And then there's that voice… *shudder*
  • Virus!Gibson was incredibly creepy in "Thingy".
  • The Vreen act as nightmare fuel on a temporal level. 80 million years in Shuggazoom's future, the most powerful insect race of the Vreen came to exist and placed their brains into advanced constantly adapting and multiplying cybernetic death machine bodies, which they used to conquer space and devour all life throughout the cosmos. After eons of eating everything, the Vreen ran out of food and sent their offspring back in time to feed on the organisms of the past, promising not to stop until they've eaten every living thing. They're literally unstoppable time traveling monsters who messed up their future so badly they came to destroy the past as part of an Omnicidal Maniac Plan based on eating alone. They even managed to defeat the Hyperforce and nearly devoured Chiro and Otto. It's a good thing Gibson managed to destroy their sole evolutionary ancestor or else they would have succeeded!
  • Here's a nice picture for you. A space ship is de-powered and lost in outer space. The team finds the ship and learns that the ship's crew had been there for possibly decades as gray husks and walking corpses that moan and shamble around a la Dead Space style. The team defeats them by breaking their glass face masks on their helmets which, because they are outside the ship, caused the putrid air that's been festering in their bodies for decades to be forcibly sucked out. The bodies are so fragile that the suction causes their faces to implode. You know, FOR KIDS!
    Zombie: *suction sound* "Wwwwwwwaaaaaaaaahhhhhhhhhhhh." *peshck*
  • The first episode to be aired, "Chiro's Girl", ends with Sakko having Skeleton King's mechanical eye forcibly and audibly removed from his right eye socket.
  • Skele-Mandarin is mutated after being swallowed by the Dark One Worm and living in its stomach for a few months, disfigured by acid and with a claw having grown where his arm had been severed.
  • The existence of the Dark Ones is this itself. The fact that some sort of malevolent cosmic force desired to extinguish all of life in the universe and spawned abominations in planets so they could hatch and ravage and corrupt the world is horrifying. We saw the destruction just one of the those things can do.
  • A general one based on Chiro's Rookie Red Ranger status; since Chiro is a kid and doesn't have the same handle on his abilities as the rest of the team, he's very vulnerable in early episodes and if he's removed from play, the team can't fight back and their best option is often "surrender and hope they come up with a plan that works".