I believe you need to have the HM Strength
u use the move strenght or find another way around. if its the boulder im thinking of
A. move the fulcrum rock closer to the boulder.
You can move that boulder by using the hidden move strength.
to move the boulder u have to have a chisel and hammer
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.
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 is an old woman on the top of the tower on the south side of solcian town (the town with the day care) that will give it to you. You must go into a tower, go up all the stairs and then one lady will give you a cleans tag, and the othe will give you that move, it is called strength.
By using the HM Strength you can move boulder's