It is important avoid touching the invisible fireballs the Alcoons place. It is possible to kill them without any beam upgrades or ammo by jumping and shooting horizontally near the floor surface. Stay near the far wall when shooting to prevent getting too close and triggering their jump. After entering the morph tunnel, roll through the two camera scroll blocks a few times to overload PLMs. They are at the entrance and two tiles in the tunnel. Exit G-mode and go through the room to the far right door.

Entrance condition:

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

Requires:

"Morph"
{
  "or": [
    "HiJump",
    "canWalljump",
    "SpaceJump",
    "canSpringBallJumpMidAir",
    "canIBJ",
    {
      "and": [
        "h_canCrouchJumpDownGrab",
        "canBombHorizontally"
      ]
    },
    {
      "and": [
        "h_canCrouchJumpDownGrab",
        "canTrickyUseFrozenEnemies"
      ]
    }
  ]
}
"h_HeatedGModeOffCameraDoor"