Requires:

{
  "notable": "Return Through Crumble Blocks"
}
"h_ZebesIsAwake"
"Morph"
{
  "or": [
    "ScrewAttack",
    {
      "and": [
        "h_useMorphBombs",
        {
          "cycleFrames": 80
        }
      ]
    },
    {
      "haveBlueSuit": {}
    }
  ]
}
{
  "or": [
    "canConsecutiveWalljump",
    {
      "and": [
        "SpaceJump",
        {
          "cycleFrames": 250
        }
      ]
    }
  ]
}
{
  "resetRoom": {
    "nodes": [
      2
    ]
  }
}
{
  "cycleFrames": 1210
}
{
  "or": [
    "canDash",
    {
      "and": [
        {
          "haveBlueSuit": {}
        },
        {
          "cycleFrames": 50
        }
      ]
    }
  ]
}

Clears obstacles: A, B

Resets obstacles: C

Farm cycle drops: 2 Geemer (blue), 2 Skree, 1 Reo

Dev note: Returning with an IBJ or frozen Geemer would also be possible, but these are probably too slow to model in a farm strat.

The Crumble Block does not respawn, so it's possible to grab the items and go back up without breaking the Power Bomb blocks.

Requires:

{
  "notable": "Return Through Crumble Blocks"
}
"Morph"
{
  "or": [
    "canConsecutiveWalljump",
    "SpaceJump",
    "canLongIBJ"
  ]
}
{
  "obstaclesCleared": [
    "A",
    "B"
  ]
}