Traverse the room with a small number of Power Bombs. If the Chozo item is still there, it is best to exit G-Mode before the final Power Bomb goes off to ensure that PLMs aren't overloaded. This strat can be done easily with 7 Power Bombs. Simply kill all of the Boyons before progressing. The final Power Bomb needs to be placed on the second to last floating platform or later to break the wall. Samus can use one Power Bomb and a Boyon hit to get from the door to the second platform, or from the second to fourth platform. Alternatively, when next to the Boyons, place a Power Bomb while the Boyon is low, slightly after the peak of the jump, hitbox through the Boyons. If the Boyons are killed, Samus can horizontally boost far enough to skip a platform. Samus can cross the room with any of the following: 7 PB; 6 PB and a horizontal boost; 5 PB and hitboxing the first Boyons; 5 PB and damage from the first Boyons; 4 PB and damage from the first Boyons and hitboxing the second; 3 PB and hitting both sets of Boyons. Note that if Samus falls into a Samus Eater, she will often be teleported into it when exiting G-Mode.

Entrance condition:

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

Requires:

"h_canArtificialMorphPowerBomb"
{
  "or": [
    {
      "ammo": {
        "type": "PowerBomb",
        "count": 6
      }
    },
    {
      "and": [
        {
          "ammo": {
            "type": "PowerBomb",
            "count": 4
          }
        },
        "h_canArtificialMorphBombHorizontally"
      ]
    },
    {
      "and": [
        {
          "ammo": {
            "type": "PowerBomb",
            "count": 4
          }
        },
        "canTrickyJump",
        "canHitbox"
      ]
    },
    {
      "and": [
        {
          "ammo": {
            "type": "PowerBomb",
            "count": 3
          }
        },
        "h_canArtificialMorphBombHorizontally",
        {
          "enemyDamage": {
            "enemy": "Boyon",
            "type": "contact",
            "hits": 1
          }
        }
      ]
    },
    {
      "and": [
        {
          "ammo": {
            "type": "PowerBomb",
            "count": 2
          }
        },
        "h_canArtificialMorphBombHorizontally",
        {
          "enemyDamage": {
            "enemy": "Boyon",
            "type": "contact",
            "hits": 1
          }
        },
        "canTrickyJump",
        "canHitbox"
      ]
    },
    {
      "and": [
        {
          "ammo": {
            "type": "PowerBomb",
            "count": 2
          }
        },
        {
          "enemyDamage": {
            "enemy": "Boyon",
            "type": "contact",
            "hits": 2
          }
        }
      ]
    }
  ]
}

Clears obstacles: A, B