Enter the room while building a shinespark and use it on the lowest part of the ramp to diagonally spark up and out of the water. Unmorphing with the correct timing and positioning for the Shinespark are very precise, and there are no extra frames on the Shinespark timer to work with. Carry the shinespark to the bottom of the ramp either with a bounce ball which takes damage from the Choot, or delay the first Choot with two shots and then use a late mockball. Then shinespark up and use SpaceJump to reach the door.

Entrance condition:

{
  "comeInShinecharging": {
    "length": 6,
    "openEnd": 1,
    "steepDownTiles": 1
  }
}

Requires:

{
  "notable": "Shinespark Water Escape With Lower Choot Alive"
}
{
  "or": [
    {
      "and": [
        {
          "enemyDamage": {
            "enemy": "Choot",
            "type": "contact",
            "hits": 1
          }
        },
        "canNeutralDamageBoost",
        "canBounceBall"
      ]
    },
    {
      "and": [
        "canDodgeWhileShooting",
        "canMockball"
      ]
    }
  ]
}
{
  "shinespark": {
    "frames": 14,
    "excessFrames": 5
  }
}
"canShinechargeMovementComplex"
"SpaceJump"
"canTrickyJump"