IBJ and use 10 PBs to kill the pirates and get to the top. Exit gmode and fall to the bottom. Note that there is a path up to the right that doesn't need wall jumps, but a crouch jump down grab is needed to get to the final platform.

Entrance condition:

{
  "comeInWithGMode": {
    "mode": "any",
    "morphed": true
  }
}

Requires:

"h_canArtificialMorphIBJ"
{
  "ammo": {
    "type": "PowerBomb",
    "count": 10
  }
}