Crouch jump on entry and spark horizontally at the peak of the jump. Samus will bonk on the corner of the ledge, but can down grab onto it. In order to prevent sparking during the crouch jump, hold shot or aim down until Samus leaves the ground. It is possible to move left during the jump to potentially save some health. In that case, letting go of left while jump is still held will activate the spark.

Entrance condition:

{
  "comeInShinecharged": {}
}

Requires:

"canSuitlessMaridia"
"canHorizontalMidairShinespark"
"canShinechargeMovementTricky"
"h_underwaterCrouchJumpDownGrab"
{
  "shineChargeFrames": 60
}
{
  "shinespark": {
    "frames": 43,
    "excessFrames": 0
  }
}

Dev note: 10 leniency shineChargeFrames are added for the expected poor room entry.