Gain run speed using a platform below the door in the other room. Jump through the door, carrying upward momentum into this room; if necessary, use a momentum-conserving morph or momentum-conserving turnaround through the transition.

Entrance condition:

{
  "comeInWithSidePlatform": {
    "platforms": [
      {
        "minHeight": 2,
        "maxHeight": 2,
        "minTiles": 27.4375,
        "speedBooster": true,
        "obstructions": [
          [
            1,
            0
          ]
        ],
        "note": [
          "This applies to Dust Torizo Room"
        ]
      },
      {
        "minHeight": 3,
        "maxHeight": 3,
        "minTiles": 39.4375,
        "speedBooster": true,
        "obstructions": [
          [
            3,
            2
          ]
        ],
        "note": [
          "This applies to Metal Pirates Room"
        ]
      },
      {
        "minHeight": 2,
        "maxHeight": 2,
        "minTiles": 20.4375,
        "speedBooster": true,
        "obstructions": [
          [
            3,
            0
          ]
        ],
        "requires": [
          "canTrickyDashJump",
          "canMomentumConservingMorph"
        ],
        "note": [
          "This applies to Metroid Room 1 and Statues Hallway.",
          "Jump with an extra run speed of $4.0 or $4.1."
        ]
      },
      {
        "minHeight": 2,
        "maxHeight": 2,
        "minTiles": 45,
        "speedBooster": true,
        "obstructions": [
          [
            3,
            0
          ]
        ],
        "requires": [
          {
            "or": [
              "canMomentumConservingMorph",
              {
                "and": [
                  "canInsaneJump",
                  "canMomentumConservingTurnaround"
                ]
              }
            ]
          }
        ],
        "note": [
          "This applies to Statues Hallway."
        ]
      },
      {
        "minHeight": 3,
        "maxHeight": 3,
        "minTiles": 39.4375,
        "speedBooster": true,
        "obstructions": [
          [
            3,
            0
          ]
        ],
        "requires": [
          "canMomentumConservingMorph"
        ],
        "note": [
          "This applies to Flyway."
        ]
      },
      {
        "minHeight": 2,
        "maxHeight": 2,
        "minTiles": 45,
        "speedBooster": true,
        "obstructions": [
          [
            4,
            0
          ]
        ],
        "requires": [
          "canMomentumConservingMorph"
        ],
        "note": [
          "This applies to Baby Kraid Room."
        ]
      }
    ]
  }
}

Requires:

"canCrossRoomJumpIntoWater"

Dev note: With HiJump, it is possible to get up relatively easily with only a single tile of doorway runway; so we don't consider side platform strats involving HiJump.