Unmorph a few tiles above the ground, and hold right to land on the platform aligning Samus with the top of the doorway. If needed, shoot the door open while falling, and hold jump to buffer the shinespark activation as soon as Samus lands.

Requires:

{
  "canShineCharge": {
    "usedTiles": 25,
    "openEnd": 1,
    "steepUpTiles": 3,
    "steepDownTiles": 3
  }
}
"Morph"
"canResetFallSpeed"
"canShinechargeMovementTricky"
{
  "shinespark": {
    "frames": 12,
    "excessFrames": 0
  }
}

Exit condition:

{
  "leaveWithSpark": {
    "position": "top"
  }
}

Unlocks doors:

{"types":["super"],"requires":[]}
{"types":["missiles","powerbomb"],"requires":["never"]}