Using SpeedBooster in the room below, run left-to-right and jump, pressing against the right side of the door frame through the transition.

Entrance condition:

{
  "comeInWithPlatformBelow": {
    "minHeight": 9,
    "maxHeight": 10,
    "maxLeftPosition": -34.5,
    "minRightPosition": -7
  },
  "comesThroughToilet": "any"
}

Requires:

"canCrossRoomJumpIntoWater"
"SpeedBooster"

Dev note: This strat is applicable in Crocomire's Room and the Post Crocomire Jump Room. Sufficient vertical speed could be obtained with fewer tiles, but it would require jumping further to the right (i.e., increasing minRightPosition) which would not work in PCJR unless the PB blocks are broken; since there doesn't yet appear to be any application, we don't add a separate case for that. Speed jumps from the right side would also be possible, but again there don't yet appear to be any applications.