you need a scroll to brack the green wall. it blast it nan!

use the box's against the door and hold down until the cirlcl stops flashing

Carry it up and use Mantis Fury Witch is pick up item drag stylus and hold til at bottom
left screen says Mantis Fury

You have to have Mantis Fury to smash the green walls.
You pick up something, and start to throw it at the green wall, but hold at the end of the
throw for a while until it says "MANTIS FURY" at the bottom of the screen. If you have
Mantis Fury, you should be able to break the wall.
Also, if you are in the Dragon Warrior costume (obtained at the end of the game) you can
break down the walls by punching them.