Enter the room on the left side and land on the ledge just below the hidden tunnel then Power Bomb boost to get into the tunnel and kil the Bulls. Alternatively, enter the room near the left with a bit of left momentum and land directly in the tunnel while taking a Bull hit.

Entrance condition:

{
  "comeInWithGMode": {
    "mode": "any",
    "morphed": true
  },
  "comesThroughToilet": "any"
}

Requires:

"canInsaneJump"
{
  "or": [
    {
      "enemyDamage": {
        "enemy": "Bull",
        "type": "contact",
        "hits": 1
      }
    },
    {
      "and": [
        "h_artificialMorphPowerBomb",
        {
          "or": [
            "h_additionalBomb",
            "h_artificialMorphMovement"
          ]
        }
      ]
    }
  ]
}

Exit condition:

{
  "leaveWithGMode": {
    "morphed": true
  }
}

Dev note: This room does not have water, so Samus can be boosted by bomb boosts without Gravity after PLMs are overloaded. It is possible to do this with 1 Power Bomb, but it is very precise and significantly depends on room entry.