This underwater walljump is very long. Some jump assistance, cross room jump, or a flatley jump from the door frame is needed to get to the first overhang. The cross room jump requires an adjacent runway of 3 tiles (with no open end) with HiJump disabled. Perform a turnaround just before hitting the ceiling.

Entrance condition:

{
  "comeInJumping": {
    "speedBooster": "any",
    "minTiles": 2.4375
  }
}

Requires:

"canLongUnderwaterWalljump"
"canTrickyJump"
"canDisableEquipment"
"canMomentumConservingTurnaround"

Dev note: With a longer runway there are fewer tech requirements to the jump, but at this difficulty they shouldn't matter.

12

This underwater walljump is very long. Some jump assistance, cross room jump, or a flatley jump from the door frame is needed to get to the first overhang.

In case of carrying a flash suit, it is possible, though difficult, to get up without killing the Skultera, or to kill the Skultera with hero shots, in case Morph is not available.

Requires:

"canLongUnderwaterWalljump"
{
  "or": [
    "canUseFrozenEnemies",
    "canSpringBallJumpMidAir",
    {
      "and": [
        "canFlatleyJump",
        {
          "doorUnlockedAtNode": 1
        }
      ]
    }
  ]
}
{
  "or": [
    "h_midAirShootUp",
    "canBeExtremelyPatient"
  ]
}

Unlocks doors:

{"nodeId":1,"types":["ammo"],"requires":[]}

This underwater walljump is very long.

Requires:

"canLongUnderwaterWalljump"

Underwater wall jump to the top middle platform before sparking to save Energy.

Requires:

"canTrickyCarryFlashSuit"
"canLongUnderwaterWalljump"
{
  "useFlashSuit": {}
}
{
  "shinespark": {
    "frames": 12,
    "excessFrames": 8
  }
}