Grrkek

''Now you'll see why they call me Grrkek the Planet Killer. (pause) Actually, you'll be too dead to see anything. But you get the idea.''

-Grrkek is having idea coop.

Grrkek is a giant alien lizard monster capable of mass destruction. He has killed millions and destroyed entire planets, and he cares for nothing but destruction and misery. He is voiced by Beau Billingslea.

Breakout
Many eons ago, Grrkek rampaged across many planets. He was eventually captured and sealed away for his crimes against the galaxy. Because no physical prison hold contain him, he was digitized and rendered immaterial, his digital essence stored inside a device resembling an old video game cartridge along with many other monsters. The cartridge eventually fell into Coop's hands and Grrkek was released while Coop was attempting to play the "game," not knowing it was a containment cartridge. Coop fought Grrkek and then blasted him with an energy weapon, which temporarily immobilized him, but this only caused a strange energy cocoon to form around the creature. Thinking Grrkek was defeated, Coop turned his attention to the other released monsters, which he finally subdued, only to find Grrkek emerge from the cocoon transformed into an even bigger and stronger form that easily shrugged off Megas' direct attacks.

Grrkek was finally defeated when he got caught in a tidal wave which Coop had caused; the cold ocean water sapped his strength and he lost his size and mass. He is now trapped in a "Love Those Lurps" game console cartridge, which greatly annoys him to no end.

Personality
Grrkek is very cruel, arrogant and sadistic, caring for nothing but destruction and misery.

Appearance
Grrkek is a large red monster with spikes and teeth and a long tail. Normally he is as tall as Megas, though his size depends on his internal energy levels.

Powers and Abilities
Grrkek has super-strength that rivals Megas when he was released from his prison. If hit with certain energy weapons, a cocoon will form around him and he will enter a dormant state but eventually emerge even larger and stronger than before. By placing both hands together, Grrkek can also power a nuclear fusion orb that can, at a minimum, devastate a city-sized area; in his larger, more powerful form, it is capable of exterminating an entire planet. Grrkek's size and mass vary based on how much energy he has absorbed. Even at his normal size, his combat skills proved to be difficult for Coop/Megas to handle. His weakness is apparently cold water: large quantities of it can extinguish his fusion orbs, sap his strength and shrink him into a much smaller, weaker form.

Trivia

 * While Grrkek has only appeared in a single episode, he does show up briefly in the show's opening, being part of a montage of villains which are fought by Coop.
 * It look like a Colossus or Kaiju monster from the Godzilla franchise.
 * Grrkek is a giant alien reptilie similar to the Iguana, Komodo dragon, Tyrannosaurus rex, Crocodile, Loch ness monster ,Stegosaur and Thorny Devil.
 * King koopa (Cartoon TV series from the super mario bros super show) also resembles Grrkek
 * His size shifting is like Kng Koopa's magical wand Megakinesis from the show The Adventure Of Super Mario Bros 3; also the female villain named Giganta from the DC Comics.
 * His voice is courtesy of Beau Billingsea who played the Gorilla Impersonator in Lupin the 3rd: Part II, CYBORG 005 / GERONIMO JR & Ogremon/Duftmon in both shows Cyborg 009 & Digimon Franchise.
 * Grrkek the Planet Killer has the same moniker as Erodious the Planet Killer from Kid Cosmic.