Align against the wall, then crouch jump into a mid-air morph. Unmorph while approaching the peak of the jump (an 8-frame window), then use Grapple immediately (a 2-frame window) to get stuck standing a pixel or two inside the first Grapple block above the door. 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. Swing down, and hold left while approaching the door to trigger the transition. To avoid heavy lag, hold down through the entire swing. Continue holding Grapple through the door transition to initiate a teleport in the next room. If needing to stand up in the next room (e.g. for an X-Ray climb), then enter the transition while swinging slowly, e.g. after coming to a stop directly below the block. If needing to transition at horiziontal position 21 (as far right as possible), then additionally roll from pressing left to pressing diagonally up-left just before the transition. The game may lag heavily if Samus enters a retracted position; if this happens, hold down to extend Grapple again.

Requires:

"Gravity"
"canCrouchJump"
"canUnmorphGrappleHang"

Exit condition:

{
  "leaveWithGrappleTeleport": {
    "blockPositions": [
      [
        2,
        34
      ]
    ]
  }
}