The Grybyx
Teenage Mutant Ninja Turtles (1987 Cartoon) episode
Season Code: 03
Episode: 41
Original airdate November 20, 1989
Written by Michael Reaves
Episode chronology
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"The Gang's All Here" "Mister Ogg Goes to Town"
Teenage Mutant Ninja Turtles 1989 Season
October 19, 1989 - December 22, 1989
List of Teenage Mutant Ninja Turtles episodes


  1. "Beneath These Streets"
  2. "Turtles on Trial"
  3. "Attack of the 50-Foot Irma"
  4. "The Maltese Hamster"
  5. "Sky Turtles"
  6. "The Old Switcheroo"
  7. "Burne's Blues"
  8. "The Fifth Turtle"
  9. "Enter the Rat King"
  10. "Turtles at the Earth's Core"
  11. "April Fool"
  12. "Attack of Big MACC"
  13. "The Ninja Sword of Nowhere"
  14. "20,000 Leaks Under the City"
  15. "Take Me to Your Leader"
  16. "Four Musketurtles"
  17. "Turtles, Turtles Everywhere"
  18. "Cowabunga Shredhead"
  19. "Invasion of the Turtle Snatchers"
  20. "Camera Bugged"
  21. "Green With Jealousy"
  22. "Return of the Fly"
  23. "Casey Jones - Outlaw Hero"
  24. "Mutagen Monster"
  25. "Corporate Raiders from Dimension X"
  26. "Pizza by the Shred"
  27. "Super Bebop & Mighty Rocksteady"
  28. "Beware the Lotus"
  29. "Blast from the Past"
  30. "Leatherhead: Terror of the Swamp"
  31. "Michelangelo's Birthday"
  32. "Usagi Yojimbo"
  33. "Case of the Hot Kimono"
  34. "Usagi Come Home"
  35. "The Making of Metalhead"
  36. "Leatherhead Meets the Rat King"
  37. "The Turtle Terminator"
  38. "The Great Boldini"
  39. "The Missing Map"
  40. "The Gang's All Here"
  41. "The Grybyx"
  42. "Mister Ogg Goes to Town"
  43. "Shredderville"
  44. "Bye, Bye, Fly"
  45. "The Big Rip-Off"
  46. "The Big Break-In"
  47. "The Big Blow Out"

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The Grybyx is a season 3 episode of the 1987 animated series.

Plot Summary

A portal to Dimension X appears in the sky over midtown, and the Turtles are concerned about what might come through. Indeed, something small and furry flies through and buzzes the news team, just as the portal closes.

The Turtles try to track down the creature, only to discover that it's telekinetic and easily able to defeat them with their own weapons. But April is eventually able to get a good look at it, and finds an adorable little creature with brown fur, antennae and an odd nose. The Turtles are charmed by it, and decide to look after it until they can return it to Dimension X.

Down in the Technodrome, Krang detects psychokinetic readings, and declares that he thinks it's a Grybyx, which is kept as a pet by some in Dimension X.

Meanwhile, another portal appears in the sky, which he Turtles think is the ideal way to send the creature back. Unfortunately, it doesn't want to go back and escapes. And before the portal closes, something else comes through. Splinter sends the Turtles to investigate this new arrival, while he and April will search for the Grybyx.

As the Turtles fly over the city in the Turtle Blimp, they spot the Starmobile. They soon discern that the creature they found is Kala's pet Grybyx, which the Neutrinos came to Earth to find. They also learn that if the Grybyx eats anything, it would be disastrous.

April and Splinter find the Grybyx sniffing around the oven, and April decides to give the creature some pizza. Leonardo's warning not to feed it comes seconds too late, as the Grybyx grows to the size of a grizzly bear and becomes violently aggressive. Kala shouts through the Turtle-Com that they need to douse the creature in water, which Splinter manages to do by breaking a water pipe. This restores the Grybyx back to its cute form, but it runs off before they can catch it.

Shredder, Rocksteady and Bebop arrive in the sewers to capture the Grybyx, and soon run into the Turtles. The Turtles and their enemies face off in battle, which is complicated by the Grybyx's mischievous sense of humor. It chases Shredder and his mutants into retreat, damaging their module, but Shredder manages to knock the creature senseless and escape with it.

Krang demands that he drain the Grybyx's energy for their use. At a laboratory, Shredder sets up the Grybyx to have its powers transmitted to the Technodrome, which will probably kill it, only to have a short-circuit wreck his plans. Bebop happens to be eating a hamburger when the little creature wakes up, and Rocksteady gives the burger to it... only for it to grow even larger and more violent than before.

The Grybyx chases Shredder and his mutants through the area, trashing everything it comes across. As it approaches the Turtles, Donatello opens up a fire hydrant and treduces the Grybyx back to its normal size. The Neutrinos depart for their home once again.

Character voices



Home media releases


  • Teenage Mutant Ninja Turtles: The Big Cuff Link Caper


  • Teenage Mutant Ninja Turtles Volume 6
  • Teenage Mutant Ninja Turtles Season 3
  • Teenage Mutant Ninja Turtles: The Complete Classic Series Collection



  • Raphael breaks the fourth wall by saying, "Don't you just hate it when people can't control their pets?"
  • This marks the first time Rocksteady actually took sympathy on another character, that being the Grybyx when Shredder and Bebop hook the creature up to the machine that'll drain its energy to power the Technodrome, which could slowly kill the Grybyx.
  • This episode and its titular character is a reference to the 1984 comedy-horror movie Gremlins, where the titular creatures turn into monsters when fed after midnight. Water also causes the creatures to multiply in the movie, while water causes the Grybyx to turn back into small and harmless after it turned huge and monstrous after eating.


  • When the Turtles were looking into the sky after the Neutrinos had returned to Dimension X, Leonardo and Donatello's belt letters were colored white.



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