Speedball through the morph tunnel and use it to break the bomb blocks in front of the hidden Missile location. This can be done using Spring Ball, or by unmorphing and using temporary blue to bounce through the bomb blocks.

Entrance condition:

{
  "comeInGettingBlueSpeed": {
    "length": 0,
    "openEnd": 1,
    "maxExtraRunSpeed": "$1.6"
  }
}

Requires:

"canSpeedball"
"canTrickyJump"
{
  "or": [
    "canTemporaryBlue",
    "h_canUseSpringBall"
  ]
}

Dev note: FIXME: This can be done at higher speeds, e.g. up to at least $2.4, or using a little more in-room runway, but is more difficult. Higher speeds probably wouldn't serve a purpose worth modeling; but extra runway length could potentially matter.