Area Room Category Name Description Difficulty Video
Crateria West Ocean 100% Sky Missile collection Show Beginner Video
To collect the top "Sky Missile", the easiest method is to use a diagonal shinespark launched from the isolated floating island, but this does cost both the time of the crash animation, and has a health cost as well.

Optimally, you can jump up from the top of the ridge, and arrest your horizontal momentum at the right moment to hit the missile location.

The "intended" strat is to ride the Trippers in succession to the upper missile location, so while this is tedious, it's in logic for Item Randomizer, with any item set that allows access to Wrecked Ship. This is especially time-consuming because the Trippers only move when they're on-screen.
Crateria West Ocean Any% Ocean Fly Show Intermediate Video
Open the Power Bomb door in the Kihunter Room, charge a shinespark, and go through the door to the Moat. Spinjump towards the pillar, fire a shot at the door, then activate the shinespark with Up or Angle Up, let go, press Right, then press Jump. If you time it right, the shot will hit the door and open it before you fly through.

The shot is most commonly a Super Missile, but can be a Missile or beam shot, but these have different timings.

The much easier alternative is the two-spark, starting the first spark in the Kihunter Room, then doing a separate spark in West Ocean. This is slightly slower, but much easier, and saves the health of sparking across the first part of West Ocean.
Crateria West Ocean All Gravity Suit Backdoor (Bowling skip) Show Intermediate Video
It is possible to enter the Gravity Suit room from the back door using Grapple to get stuck inside the wall and then doing a Crystal Flash to force-stand. After that you can X-Ray climb up into the door transition.

Note that this still requires Phantoon to be defeated, otherwise Gravity Suit will not be spawned at its location.