Enter the room in G-mode, perform a Crystal Flash, then lay an additional Power Bomb, preferably at the top of the room. The Power Bomb will not explode but will continually force Ridley into a corner of the room. If the Power Bomb is laid near the top of the room, then Ridley will be forced into the bottom of the room, making it easy to damage Ridley at the highest possible rate; if the Power Bomb is laid lower, Ridley will be forced to the top of room, and Samus will have to jump repeatedly to bring it on camera. in which case Ridley can still be damaged but more slowly and with some caution needed to avoid invisible fireballs. After reducing Ridley's health to zero, take damage from Ridley or an invisible fireball to trigger auto-reserves and exit G-mode. Then get grabbed by Ridley to finish the fight.

Entrance condition:

{
  "comeInWithGMode": {
    "mode": "any",
    "morphed": false,
    "mobility": "mobile"
  }
}

Requires:

{
  "notable": "G-Mode Crystal Flash Stuck Ridley"
}
"h_heatedGMode"
"h_CrystalFlash"
"h_usePowerBomb"
{
  "or": [
    {
      "and": [
        {
          "or": [
            "canWalljump",
            "HiJump",
            "canSpringBallJumpMidAir",
            "SpaceJump"
          ]
        },
        {
          "ridleyKill": {
            "powerBombs": false,
            "gMode": true,
            "stuck": "bottom"
          }
        }
      ]
    },
    {
      "ridleyKill": {
        "powerBombs": false,
        "gMode": true,
        "stuck": "top"
      }
    }
  ]
}
{
  "autoReserveTrigger": {}
}
{
  "heatFrames": 520
}
{
  "partialRefill": {
    "type": "Energy",
    "limit": 100
  }
}

Clears obstacles: f_DefeatedRidley, door_1