This is usually done to skip the first visit in the Sealed Grounds, the Kikwis and the Slingshot. Due to that, it requires a Faron BiT enabled file with the Faron light pillar and diving. The file setup is the following:
Follow the next steps:
This will Reverse BiTWarp File 2 into the Skyview Temple with the Upper Academy Statue coordinates. It also RBMs the value for the Skyview entering cutscene, meaning that Skyview will be in the layer 1 state.
Note: The Skyview Entering Cutscene only exists in Deep Woods layer 1, hence the Sealed Grounds Introductory Cutscene requirement on File 2. You could also Reverse BiTWarp into Skyview Temple without the entering cutscene playing if you wish to (or Reverse BiTWarp into Deep Woods to enter Skyview from the back), but that is slower since beating Skyview Zero adds a RBM.
By using both the Early Farore's Silent Realm trick and the Early Thunderhead trick, it is possible to obtain the Water Dragon's Scale before finishing Skyview Temple. This sets the layer for Skyview to its Skyview 2 state which has the following key differences:
Because Skyview 1 has not been completed, there are some interesting side-effects:
Because of these unique properties, it is possible to combine both visits to Skyview Temple into a single visit, thus saving time over having to redo the dungeon a second time, even in its abbreviated state.
This trick skips both Small Keys in Skyview Temple, and therefore two-thirds of the dungeon.
When you enter Skyview Temple, save at the first statue, then activate BiT, either via a corrupt file or dying to the Keese. BiTWarp at the Upper Academy Statue, and you should appear in the circular room at the center of Skyview. The room will be only partially loaded.
To reload the room, go to the room with the Boss Key and follow the path on the right, entering the door when you reach the end. Kill the Staldra (or two Staldras, if using the Combined Skyview route) to unlock the door and go back the way you came to reload the main room. From here you can either go directly to the Boss Key or go back through the gate and obtain the Beetle.
This same BiTWarp can be used during the second visit to Skyview. For that visit, you can activate BiT using bombs, then after the warp, reload the room by saving at the nearby statue and either deathwarping or reloading your file. You can then proceed to the triple Stalfos fight.
If you perform the BiTWarp above, you'll reach a Skulltula blocking a jump over a pit. To pass the Skulltula without the Beetle, you can use a horizontal Skyward Strike to cause the spider to swing like a pendulum, and jump past it with good timing.
If using the Combined Skyview route, this Skulltula is absent, so this trick does not have to be done.
This method is the most consistent method for handling the Stalfos, but it requires a shield.
As an additional small timesaver after the Stalfos dies but before the chest spawns, if you aim the camera 45 degrees left of where the Beetle chest will spawn, you'll skip a small camera panning cutscene after the chest spawns. You can also C-up before the chest spawns.
This Stalfos is absent if using the Combined Skyview route, making obtaining the Beetle trivial in such runs.
By standing at the right spot and aiming correctly, it is possible to hit the crystal with the slingshot to open the gate to the heart piece. This skips flying the Beetle to the crystal and saves about 10 seconds.
Instead of climbing the vine wall and having to recross the tight rope, jump back to the vine you previously used. If you are low enough on the vine and gain enough speed, you can reach the second vine and then jump over to the Boss Door.
It is possible to completely skip the Ghirahim 1 fight using Reverse BiTMagic. This trick requires the Practice Sword to have been obtained on at least one file.
The corresponding flag is Dx08. On Skyloft it is set by triggering the Shiekah Stone cutscene near the Sparring Hall. This cutscene can be enabled by saving a file that has obtained the Practice Sword during BiT. Start your file, then run into the trigger to perform the RBM. Note that this skips isn't faster than fighting Ghirahim by itself, but becomes faster to perform when you need to copy a file in Skyview.
In the first phase, you must move Ghirahim's hand to one side, then attack from the other once he locks his hand in place. You can hit him three times before he will begin to dodge again. One recommended method is:
Ghirahim's second phase is slightly random, as he has four possible attacks. In general, you want to wait for him to be vulnerable, then attack in a specific pattern. It is possible to finish Ghirahim's second phase in six cycles:
It is important to slash first before spin attacking, as Ghirahim takes more damage when stunned. If the stab in the first cycle doesn't land, or you use a different combo, it will take seven cycles to defeat Ghirahim.
These are the attacks that Ghirahim uses:
In this attack, Ghirahim will hold his sword in a guard position for a second or two, then attack. This is the easiest attack to deal with, as he is vulnerable immediately.
In this attack, Ghirahim will disappear, and then reappear either in front of or behind you, with his sword held in a guard position. He is vulnerable immediately after reappearing.
In this attack, Ghirahim will hold his sword behind him to either side (sometimes hopping backwards first to gain distance), and then charge you. He is vulnerable while charging, but you have to time the slash carefully. As a safer alternative, you can spin attack, but you'll lose the chance at a six-cycle fight. As an even safer alternative, you can shield bash this dash attack.
In this attack, Ghirahim will summon five red daggers in a line and fling them at you. This is the worst attack to get, as he is never vulnerable during it. The fastest way to deal with this is to swing your sword to hit all five darts, thus cancelling the attack.
You want to get as few dart attacks as possible, and cancel those you do get as quickly as possible. One good strategy is to not Z-target until he is vulnerable, and to try to herd him towards the center of the room. This will minimize dart attacks and avoid him teleporting away from you when he reaches the edge of the arena.
To defeat the Bokoblin Archers guarding the tightrope in front of the boss door, it is normally required to use the Beetle to drop a bomb on the archers. However, this can be skipped by using the upgraded Hero Mode Skyward Strike to hit the Bokoblin Archers from the other side of the rope. With a good angle, you can hit both archers in a single Skyward Strike. A good way to get the angle required is to stand in the right corner of the platform near the rope, and aim for the left edge of the boss door.
There is a quick method for killing all three Stalfos at once using bombs and Skyward Strikes. Follow these steps:
You can speed up the above a little by throwing the second bomb in between the first Skyward Strike and the first spin attack, but the timing becomes tighter. If one of the Stalfos survives the second round, just finish it off normally.
By running next to the spiders on the bridge, you're able to jump past them, which allows you to skip the vines in the room.
In the eastern water room, you can skip the Mogma text near the web by running up the wall next to the first blue mushroom on the right. After getting the key, enter the crawlspace while being angled to the left, so that you can jump out of the crawlspace directly into the water, skipping the mogma text again.
Skyview Zero is the state that Skyview Temple is in before you watch the cutscene of Link entering the Skyview Temple in Deep Woods. Many parts of the temple are unloaded, including most doors, making the temple difficult to navigate. This is because to set the layer of Skyview to be layer 1 you need to watch the cutscene of Link walking into the temple (that triggers after hitting the switch and opening the doors to the temple). As such, skipping hitting the switch causes Skyview to be in layer 0, aka Skyview Zero. In layer 0, only actors that exist on every layer are present, and nothing else. Because the temple is so bare bone, it is impossible to complete this without further glitching.
Save at a statue in the Deep Woods and activate BiT. Perform a BiTWarp at the Lower Academy statue; the positioning here is important, as the wrong position will lead to an infinite voiding loop. One position that works is standing next to the statue on the left side.
Once you've done the BiTWarp, you'll end up behind Skyview Temple. The walls here aren't solid, so you can run to the stairs leading into Skyview and jump into them from behind. Walk up the stairs to the loading zone and you'll enter Skyview Zero.
Since most doors are unloaded, it is very difficult to do anything useful in Skyview Zero. One thing you can do is obtain the Dungeon Map; this is the same dungeon map as the other two versions of Skyview. It's even possible to do this without the slingshot, as the slingshot switches can also be activated with the sword.
You can also do the same BiTWarp as the other versions of Skyview to reach the central room. You can enter the Beetle room, but the Stalfos fight will not trigger, trapping you there. You cannot reach the Boss Room, as the tightrope doesn't load.
It is possible to make the tightrope to the boss door load by saving at the hub room statue and reloading. However this causes the gate that prevents you from progressing straight to the boss door to appear. Luckily, using the Reverse BiTMagic technique, it is possible to set the switch controlling that gate to be hit, and cause the gate to open.
The corresponding flag on Skyloft is set by talking to Flegde in the Academy after delivering the barrels to the kitchen. Start your file on the first textbox after receiving the 20 rupee reward to open the gate.