It is possible to get to the item tankless with HiJump, or from jumping off of a frozen crab.

Requires:

{
  "useFlashSuit": {}
}
{
  "or": [
    {
      "shinespark": {
        "frames": 73,
        "excessFrames": 2
      }
    },
    {
      "and": [
        "HiJump",
        {
          "shinespark": {
            "frames": 70,
            "excessFrames": 2
          }
        }
      ]
    },
    {
      "and": [
        "canTrickyUseFrozenEnemies",
        {
          "shinespark": {
            "frames": 72,
            "excessFrames": 2
          }
        }
      ]
    }
  ]
}

Clears obstacles: A