There are two boulders to the left inside the castle grounds, and one up the stone steps to the right. Each of the three is used to block one of the 4 water geysers, so that you can use one long stream to reach the broken window and enter the castle.
You need the crowbar (in the first crypt you pass in the cemetery) to pry out the far left boulder.
To get the boulder to move on Mythology Island in Poptropica, first, you'll need to obtain the Golden Apple from Hercules. Once you have the apple, go to the boulder and offer it to the hungry Cyclops. The Cyclops will then move the boulder for you.
to move the boulder u have to have a chisel and hammer
you get Hercules to move it
kill him
A. move the fulcrum rock closer to the boulder.
You can move that boulder by using the hidden move strength.
Only Hercules has the strength to move the boulders at the throne rooms of Hades and Poseidon. And Herc will not help you until after Zeus has stolen the Sacred Items from you, in his bid to rule Poptropica. To reach the throne rooms with Hercules, you need the Touchscreem Mirror from Aphrodite's test (on the beach in Poseidon's realm).
This boulder is probarly a boulder you need the HM strenght for, which eenables a pokemon to move bulders.
You have to collect 20 clay and then ask the tassel mouse or boblink's to help you move the boulder.
To move a big boulder you need obtain the move Strength. To use the move outside of battle you need the Rainbow badge.
Well any pokemon that can use the strength tm to move that boulder out of the way unless it's a big boulder you cant move that
There was no security specifically for the island. The security for Polyphemus' cave was a giant boulder which blocked it's entrance and which 20 - 4 wheeled wagons would be unable to move.