Enter the room with a super sink, and hold left; Samus will soon clip down 1 tile into the slopes and so will not be directly visible, but her air bubble animation can be used as a reference. Position inside the second upward slope, and wait for Samus to reach 2 tiles of fall speed, at which point she will clip down to the door transition below.

Entrance condition:

{
  "comeInWithSuperSink": {}
}

Bypasses door shell: true