It takes around 3 minutes to get the Zero to this door. Let the Zero climb the right wall and jump on top of it in Morph Ball form to bounce up to the Cacatac platform. The Zero only moves on camera and the camera scrolls when exiting the morph tunnel. Let the Zero lead through the morph tunnel or wait for the it to get very close to Samus before touching the scroll block at the exit.

Requires:

"canBeVeryPatient"
"Morph"
"canNeutralDamageBoost"
"canTrickyJump"
"h_canCrouchJumpDownGrab"
{
  "enemyDamage": {
    "enemy": "Zero",
    "type": "contact",
    "hits": 1
  }
}

Exit condition:

{
  "leaveWithGModeSetup": {}
}