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).
Yes, you need the Hydra scale as one of the five sacred items to fulfill the quest.
go to the end and tap the monster
you dont you just click on the graffiti and clean it
The "gnarly monster" is Hydra, in the underwater cave in the realm of Poseidon. The other monster is the three-headed dog Cerberus in the realm of Hades.
You have to swim through an underwater maze. Pop bubbles for oxygen.
When the monster strikes, jump on it's head.
When you have defeated the Hydra, swim under it to get a scale (one of the five sacred items). You can get another item, the Giant Pearl, outside the cave. You must collect the rest of the 5 items (and the Touchscreen Mirror) and return the items to the Tree of Immortality. (see related questions)
On Mythology Island in Poptropica, the final thing you do is defeat Zeus in a battle to stop him from taking over the island. Once you defeat Zeus, you will have completed the main quest of the island and can claim your medallion.
on top of the sphinx monster
You don't have to get past it, as nothing's behind it. To defeat the Hydra, get close and let it attack you with one of its heads. Before it hits you, jump up and land on top of the head, knocking it out. Repeat this for the other four heads. When you have defeated the Hydra, swim below it to get the scale. (see related question)
what you do is when the monster growls and is about to bite you duck and when he is dizzy shoot him. good luck
defeat him and you will get your stuff back