123

Either jump over a Cacatac or tank a spike hit. Perform a mid-air spark through the speed blocks. Then run to the right and back to get speed to go through the rest. If performing the spark with low energy, there is a risk of ending the spark above the spikes or in front of the Pirate; to be safe, assuming Samus has heat protection, begin the shinespark with between 73 and 88 energy, or at least 106 energy; with a buffered crumble jump to the right, up to 94 energy can work.

Entrance condition:

{
  "comeInShinecharging": {
    "length": 5,
    "openEnd": 1
  }
}

Requires:

{
  "notable": "Reverse Spark"
}
"canShinechargeMovementTricky"
"canTrickyJump"
{
  "or": [
    {
      "enemyDamage": {
        "enemy": "Cacatac",
        "type": "spike",
        "hits": 1
      }
    },
    "canBePatient"
  ]
}
{
  "or": [
    {
      "shinespark": {
        "frames": 88,
        "excessFrames": 11
      }
    },
    {
      "and": [
        "h_heatProof",
        "canControlShinesparkEnd",
        {
          "shinespark": {
            "frames": 88,
            "excessFrames": 44
          }
        }
      ]
    }
  ]
}
{
  "heatFrames": 825
}
"h_getBlueSpeedMaxRunway"
{
  "or": [
    "canSpeedball",
    {
      "heatFrames": 15
    }
  ]
}

Clears obstacles: A

Dev note: The canBePatient represents retrying until RNG works out to be able to jump over one of the Cacatacs without taking a hit. There is a possibility of getting a lucky drop from one of the two Pirates; but since it is low probability, we don't model it. The speedball exit is technically not a valid way to leave normally (e.g. in case the next room is heated and Samus needs to jump); but if necessary, it is possible to unmorph near the transition.