WORLD RECORD RECORDING
The beginning until X-Ray Scope is basically the same as GT categories - Morphing Ball, Bombs, Missiles (one pack), Super Missiles (one pack), Power Bombs (one pack), and one Energy Tank are acquired, and are the only items acquired, before traversing the X-Ray hall and acquiring the X-Ray Scope. Keep in mind that Charge Beam is not required at all for this category.
Upon entering Red Tower, go up and grab the Power Bomb (Alpha) pack. Make sure to farm so that you have full health before the X-Ray hall. Damage boost your way through the room with the help of the Wavers in the room. After getting the X-Ray Scope, you can either wait for the Wavers to appear before you (safe strategy), or you can jump straight out after the fifth fade-in that you can see in the background (faster).
After X-Ray, climb up Red Tower again and get all the way up to the ship. Make sure to fill up on Super Missiles. Get in the Parlor and wait for the Geemer (blue) to get in position, then fire off a Super Missiles and run through the door.
If you're successfully stuck inside the door, perform an X-Ray Climb until you reach the above tile on the map. Morphing Ball can be turned off as it makes the X-Ray Climb a bit safer, but make sure to turn it on after you're done X-Ray Climbing.
The current World Record instead uses a frame-perfect pause going into the door transition between Parlor and Climb in order to go out of bounds. The route uses out of bounds transition blocks in order to go to Landing Site followed by Crateria Power Bomb Room, where you pick up Power Bombs as the first item. Then go down and collect Morphing Ball as usual, but go left through the Power Bomb blocks to Big Pink, where you collect the Missile pack above Charge Beam. Go up to Early Supers Room and collect the Super Missiles, then go across to Brinstar Pre-Map Room, kill all the enemies there, and leave. Opening the grey door at the end of this room triggers the awakening of Crateria, which is necessary to use the Geemer for getting stuck inside the door later.
After this, you can go down Red Tower to the X-Ray Room, and the route is the same as the previous route for the rest of the run.
The Out of Bounds section can be filled with bad blocks if you reset.
Total - A succinct category walk-through.
Twocat - Setting up the Geemer damage boost.
ShinyZeni - The "doorskip" route, used in the current World Record.