It is possible to climb up with a tricky dash jump and no wall jump. Either kill the Alcoon before it spawns any stationary, invisible fireballs, or let the right alcoons shoot enough to overload projectiles.

Entrance condition:

{
  "comeInWithGMode": {
    "mode": "any",
    "morphed": false
  }
}

Requires:

"h_heatedGMode"
{
  "or": [
    "canWalljump",
    "HiJump",
    "canSpringBallJumpMidAir",
    "SpaceJump",
    "canUseFrozenEnemies",
    {
      "and": [
        "canTrickyDashJump",
        "canTrickyDodgeEnemies"
      ]
    }
  ]
}
{
  "heatFrames": 0
}