To save a bomb, it is possible to roll from the doorway onto the platform with movement similar to a Gravity jump - hold forward just before the pause to disable gravity.

Entrance condition:

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

Requires:

{"or": [
  "Morph",
  "h_artificialMorphSpringBall",
  {"and": [
    "Gravity",
    {"or": [
      "h_artificialMorphLongIBJ",
      "h_artificialMorphJumpIntoIBJ"
    ]}
  ]},
  {"and": [
    "Gravity",
    "h_artificialMorphBombHorizontally",
    {"or": [
      "h_additionalBomb",
      "canTrickyGMode",
      {"and": [
        "canTrickyDodgeEnemies",
        "canGravityJump"
      ]}
    ]}
  ]}
]}

Exit condition:

"leaveWithGMode": {
  "morphed": true
}

Dev note: It is possible to cross with a single Power Bomb, but it requires a last pixel jump with a frame perfect forward press. A crab hit could bounce Samus onto the middle platform, but the gravity jump is better. If Samus has a blue suit and cant pause, then she also cant boost from the crab.