12

Store a shinecharge then use Screw Attack to break through the bomb blocks down to the item location. Reach the item while still having a shinecharge. Doing a moonfall can save a few frames.

Entrance condition:

{
  "comeInShinecharging": {
    "length": 12,
    "openEnd": 0
  }
}

Requires:

"ScrewAttack"
"canShinechargeMovementTricky"
{
  "heatFrames": 155
}
{
  "shineChargeFrames": 155
}
{
  "or": [
    "canMoonfall",
    {
      "and": [
        {
          "heatFrames": 5
        },
        {
          "shineChargeFrames": 5
        }
      ]
    }
  ]
}

Clears obstacles: B

Unlocks doors:

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

Dev note: Storing the shinecharge on the left side of the runway takes fine control over shinecharge spacing, but that is ok at this difficulty.