The entrance to the Hydra cave is underwater in the maze in Poseidon's realm. Swim across the top, down the right side, and then left across the bottom.
The "gnarly monster" is the five-headed Hydra. When you approach it, it will strike out at you with one of its heads. Before it hits you, jump high into the air. When you come down, land on top of the head, knocking it out. Repeat this for all five heads, before any can wake up. Swim beneath the Hydra to get a scale (one of the 5 sacred items).
play on the pipe blue green yellow blue red green
When you se e the head look like a retard and it comes to get you jump on his head and it will say thump do it until they all go down
when it's heads jump on it.
how do you beat the three headed dog
On Poptropica.
Wait for the hydra to attack then jump on each of its heads tell they are all sleeping. Then click on the Hydra.
you go to the beach and there will be a sine that says gnarly monster, you go under the water. there will be bubbles .collect them to get more breath. when you are to the bottom of the sea. you will see a cave. go in to find the hydra.
The special scale is from the monster Hydra, in the 'gnarly monster's cave' under water.
sorry im not that far i only beat the big foot thing
The only monsters to beat with a bomb are on Astro Knights Island. (see related question)
you go to a mysterious planet in the asteroid belt then get the key and then beat the monster with the owl and then take the princess!
beat the guy in the game, get ticket, ride boat, talk, take picture, DONE
Monster Carnival Island was never opened on Poptropica.
how do you beat vampire island on poptropica
there not a monster game in poptropica they canceld it
the only reson monster high was on poptropica was when it begain and that was limated/only can happen then.