Immediately spark after the door transition into the wall just to the right of the top right door.

Entrance condition:

{
  "comeInShinecharged": {
    "framesRequired": 10
  },
  "comesThroughToilet": "any"
}

Requires:

"canSuitlessMaridia"
"canPrepareForNextRoom"
"canMidairShinespark"
{
  "shinespark": {
    "frames": 88,
    "excessFrames": 21
  }
}