A charge beam shot will pass right through the dividing wall if fired from the correct 2-pixel window. Using angle down the spot is where Samus' front toe touches the wall. Using angle up, it is where Samus' front foot is on the seam in the floor.

Requires:

{
  "notable": "Back-Side Magic Pixel Beam Fight"
}
"h_navigateUnderwater"
{
  "enemyKill": {
    "enemies": [
      [
        "Reverse Botwoon 1"
      ],
      [
        "Reverse Botwoon 2"
      ]
    ],
    "explicitWeapons": [
      "Charge+Plasma",
      "Charge+Ice+Spazer"
    ]
  }
}

Clears obstacles: f_DefeatedBotwoon

Sets flags: f_DefeatedBotwoon