Cross the room then lure and kill the two floor Sidehoppers using the morph tunnel. With the ceiling Sidehopper in the top right corner, quickly roll to the left next to the stair. It is required to avoid double hitting the Sidehopper with the Power Bomb or it will die. Place a Power Bomb, Wait a second, then roll to the right to lure the hopper and quickly return and Crystal Flash. Waiting briefly will prevent the hopper from coming too soon and getting double hit.

Entrance condition:

{
  "comeInWithRMode": {}
}

Requires:

"h_ZebesIsAwake"
"h_usePowerBomb"
{
  "or": [
    "h_bombThings",
    {
      "and": [
        {
          "getBlueSpeed": {
            "usedTiles": 21,
            "openEnd": 1
          }
        },
        "canSpeedball"
      ]
    }
  ]
}
"canComplexRModeCrystalFlashInterrupt"
{
  "ammo": {
    "type": "Missile",
    "count": 10
  }
}
{
  "or": [
    "h_partialEnemyDamageReduction",
    {
      "resourceAtMost": [
        {
          "type": "RegularEnergy",
          "count": 19
        }
      ]
    },
    {
      "and": [
        {
          "resourceCapacity": [
            {
              "type": "RegularEnergy",
              "count": 199
            }
          ]
        },
        {
          "resourceCapacity": [
            {
              "type": "ReserveEnergy",
              "count": 199
            }
          ]
        }
      ]
    }
  ]
}
{
  "obstaclesCleared": [
    "A",
    "B",
    "C"
  ]
}