With only a runway of 2 tiles (open end) in the other room, this requires a double-frame-perfect setup: release forward for exactly 3 frames, and repress forward on the last possible frame before the transition. It is possible to clear the Mochtroid with Power Beam without taking damage, by first firing angle up shots and then switching to angle down shots once the Mochtroid is on top of Samus.

Entrance condition:

{
  "comeInStutterShinecharging": {
    "minTiles": 2
  }
}

Requires:

"canPreciseStutterWaterShineCharge"
"canInsaneJump"
{
  "or": [
    {
      "enemyDamage": {
        "enemy": "Mochtroid",
        "type": "contact",
        "hits": 2
      }
    },
    {
      "and": [
        "canDodgeWhileShooting",
        {
          "or": [
            "Wave",
            "Spazer",
            "Plasma",
            {
              "ammo": {
                "type": "Missile",
                "count": 1
              }
            },
            {
              "ammo": {
                "type": "Super",
                "count": 1
              }
            },
            "canTrickyDodgeEnemies"
          ]
        }
      ]
    }
  ]
}
{
  "shineChargeFrames": 0
}

Dev note: FIXME: canInsaneJump is for difficulty placement; replace with a more appropriate tech since no jump is involved.