Enter with a high shinespark through the door then shoot the opposite door and fall into it.

Entrance condition:

{
  "comeInWithSpark": {
    "position": "top"
  }
}

Requires:

"canPrepareForNextRoom"
{
  "shinespark": {
    "frames": 20,
    "excessFrames": 3
  }
}
{
  "doorUnlockedAtNode": 3
}

Unlocks doors:

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