Grapple to the fifth Grapple block below the door (the third one fully above the water line), jump off from it, and morph. Unmorph slightly before the peak of the jump (a 3-frame window), then immediately use grapple (a 2-frame window) to get stuck standing a pixel inside the second Grapple block. Then jump (to force crouch), angle down, and grapple. Samus will enter a 'glitched grapple hanging' state where Samus' graphics will appear corrupted while swinging with Grapple. Press jump to get a good bounce off the wall at the bottom of the swing, making it possible to swing up to the door. To minimize lag, when grapple is extended horizontally release all inputs other than shot/grapple; there will still be a bit of unavoidable lag while Grapple is initially extending. Try to get a good first bounce; otherwise heavy lag may be difficult to avoid, and it may be better to retry from the beginning. While swinging up, tap up to retract Grapple to avoid the ceiling (or tap up after after coming to rest against the ceiling if this happens). Samus should usually come to a stop one tile in front of the door (at horizontal position 215). Roll from pressing right to pressing diagonally down-right to enter the transition. If it is needed for Samus to be able to stand in the next room, then only briefly press diagonally down-right and then press up, bringing Samus to a stop at position 225 or 227; then roll from right to down-right to enter the transition (at horizontal positon 235).

Requires:

"Gravity"
"canUnmorphGrappleHang"

Exit condition:

{
  "leaveWithGrappleTeleport": {
    "blockPositions": [
      [
        12,
        12
      ]
    ]
  }
}