WORLD RECORD RECORDING
0%, also known as Low% Glitched, is the lowest percentage required to beat the game by any means necessary. The history of Low% Glitched can be seen on the Record Progression page, including the previous percentages that were thought to be the lowest possible such as 3% and 2%. This category relies on the item percentage shown at the end of the credits; the single-file method for 3% collects 4 items, making that the lowest number of items collected in a run.
In order to achieve the goal of 0%, Samus must utilize block 0F(44) (also known as god block), which is probably the most powerful block in the entire game. This block does a different thing depending on Samus's X position, making it very difficult to get it to do what you want. A few of the more important things that it can do are: giving Samus ammo i.e. missiles, supers, power bombs without actually increasing her max amount (causing it to not count towards item %), removing all major items except beams and reserves from Samus's "have" list meaning that they don't count towards item %, setting Samus's max for ammo to 0, as well as crash the game a few different ways. It is pretty clear to see that it allows some extraordinary item % manipulation.
For 0%, this block is created twice. Once to give Samus 127 Power Bombs while leaving her maximum at 0, and once to remove all of her major items.
The beginning up to the "Climb" is basically the same. Once the bombs are collected, the save station is used in Parlor, and a file is copied over from the save to another file. From there, the player will obtain GT Code on one of the files and return to the Parlor area. The player cannot use the effects of "space time" to speed up the return trip, as it will cause the player to return to Ceres Station, as well as be forced to watch the intro cutscene, if they save and reload a file that previously used space time.
A frame perfect shinespark during the Landing Site -> Parlor door transition is required to become stuck in the right Parlor door. From there, the player will X-Ray climb out of bounds and manipulate part of the out of bounds with the X-Ray Scope in such a way that, on the other file, the Parlor will then contain the 0F(44) block. Once the out of bounds has been manipulated, the player will have to safely exit the out of bounds without returning to the ship area and kill themselves. The fastest method is using the acid in Crateria Super Room. If the ship area is ever accidentally entered, it will completely erase any previous out of bounds manipulation, so it is important that the player knows how to, and when not to, enter the ship area in this run.
After successfully modifying data and exiting the out of bounds, the player has to kill themselves instead of saving a/o resetting because resetting the game, or simply causing the intro scene to play, will change what the out of bounds contains. The menu after dying also has to be taken cautiously, because accidentally showing the intro scene there, like previously stated, will ruin the previous manipulation.
The player should then access the other non-GT file, and perform a 2x frame perfect trick involving a frame perfect pause while falling down to the Parlor -> Climb vertical door, then a frame perfect position change (such as angle up or firing the beam) while falling through the door transition. When this doorskip is executed perfectly, the player should fall through the door transition itself, into the out of bounds, where they will be able to use the newly-created 0F(44) block to set Samus' power bomb count to 127 without increasing her maximum.
After navigating back in-bounds, another doorskip from Parlor is required, this one in order to get through Landing Site out of bounds, before hitting a door transition to Crateria Tube, where you'll come back in-bounds. From here you go down and collect X-Ray Scope in a similar manner to Any% Glitched.
Next, after saving in Parlor and resetting, another doorskip is required from Parlor to Landing Site, in order to create and use the block that will give the artificial Varia Suit. After this, you need to transition to Parlor, then Terminator Room, where you'll go back in-bounds. Save, then doorskip again to go down Red Tower into Norfair.
Navigate back up to Parlor, save, and do another doorskip to Landing Site, in order to reset to Ceres and remove the missiles, using the method from 3%.
The items that make up 0% are the following:
Similarly to above, one Missile expansion is also required to awaken the planet. Because all missiles are deleted in the end, there is no limit to the number that are allowed to be collected if one so desires.
Bombs are required to do a lot of the out of bounds necessary to make 0% possible.
Powerbombs are required to open orange doors and destroy other destructible surfaces that block the way. They are also required to collect x-ray.
Varia Suit is required in order to resist heat damage during the key out of bounds navigation. It is worth noting that Varia is not collected in the traditional way, but is rather created in the out of bounds area of landing site and collected that way.
X-Ray Scope is required as it is an integral part of most of the out of bounds navigation, allowing Samus to x-climb into the out of bounds areas of certain rooms but also to modify the BTS of blocks and create whatever blocks are necessary.
Matrick created a LOTAD (Low Optimization Tool Assisted Demonstration) with commentary, that you can find here.
Category page under construction.