Eustace Monsters Mysterious aliens – An unknown race of colourful bald, big-headed aliens secretly controlling those who create the monsters. They can take human form, and their plan is to destroy Capital City, though the reason is unknown. Giant Spiders – The first of the monsters that the warriors battle. (possibly based on Kumonga) Kraken – A giant squid that destroys the harbour day in the city and sucks one of the Warriors in. Giant Alligators – Found in the sewers. 60-foot Bumblebee – Tried to drain Capital City's power supply. Skeleton Crew – A small tactical strike team of living green skeletons that tried to poison Capital City's water. T. Rex – Found in a carnival. Giant Anaconda – Found in the North Woods. (possibly based on Manda) Alien Zombie from the Planet Zeenom – Not related to the mystery aliens although it does resemble them, it was created by accident when Klaus' Monster Machine broke and zapped Missy's comic book. This intelligent and benevolent giant monster is featured in seasons 1 and 2. Pterodactyls – This monster is featured in season 1 and season 2. (possibly based on Rodan) Praying Mantis – This monster was also featured in both seasons. (possibly based on Kamacuras) Killer Vine – A vine that grows and grows and is later killed by the giant slug. Giant Slug – A monster sent by Klaus to stop the killer vine from eating him. Carnivorous Butterfly – A butterfly that eats meat and can enchant its victims with its beauty so it can catch them more easily. (possibly based on Mothra) Cockroaches – Were fried by a gas explosion underneath Capital city. Dragon – A dragon that captures Vanka. Ice Monster – A tall ice monster. This monster is featured in both seasons. Lobster – Emerged from a beach in Capital City. Blob – A monster that somehow appears to consume Mayor Mel and almost does the same to Vanka. Worm – An earthworm that eats subway trains. Giant Metal-Eating Radioactive Junk Monster – One of Klaus' seemingly failed experiments, but when he threw it out it started absorbing all the metal in the junkyard, becoming a radioactive menace so deadly even Klaus wanted to destroy it. Termites – Found in the fire station's basement. Then the queen trapped Mayor Mel in City Hall. Giant Mud Monster – A monster made out of mud. (possibly