123

Dive into the acid to the left of the first floating platform to quickly drop down the room, holding left. Use a flash suit to activate a diagonal shinespark after falling just far enough to clear the large stalactite.

Requires:

{
  "notable": "Reverse Acid Dive"
}
{
  "obstaclesNotCleared": [
    "A"
  ]
}
"Gravity"
{
  "heatFrames": 405
}
{
  "acidFrames": 280
}
{
  "useFlashSuit": {}
}
{
  "shinespark": {
    "frames": 38,
    "excessFrames": 0
  }
}

Unlocks doors:

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