Enter the room with enough stored fall speed to clip through 2 tiles. Perform a moonfall right-to-left near the edge of the ledge, to reach the slope below. Then moonfall again from on top of the door, to clip down through it.

If moonfalling from the very edge, Samus will clip down into the floor below the slope, and Grapple can be used to stand back up. Alternatively, moonfall slightly further from the edge, to clip down below the ledge, ending up flush with the top of the slope; in this case, be careful to release left quickly after initiating the moonfall, to avoid tripping on the slope; it is safest to stand up by holding right, then moonwalk while traversing the slope. Performing the final moonfall while over the edge of door can be useful to avoid carrying stored fall speed into the next room.

Entrance condition:

{
  "comeInWithStoredFallSpeed": {
    "fallSpeedInTiles": 2
  }
}

Requires:

"canMoonfall"

Bypasses door shell: true