Hey /v/, let's play some FUCKING VIDEOGAMES
>Download attached .pdf
>Rename it to .zip
>It's a .zip archive of a vanilla Super Metroid rom, plus 3 or 4 rom copies that were ran through an item randomizer
You can get pretty much any item at any time. They did bias it so that you shouldn't get stuck (eg, you might find Power Bombs early on, but you won't necessarily find bombs for a long time). Generally, any "core" item pick up or energy tank is possibly replaced with another core item. One common one is having the Morph Ball embedded in the ceiling in the room you normally get missiles in, instead of the energy tank. You have to be hit into it from an enemy. It does require some knowledge of speedrunning glitches to do some item routes, such as the mockball.
I put the rom(s) through this randomizer here: note that I only supplied the .zip/.pdf attachedment in case some anons don't have a copy of their own to use. You can put the vanilla rom into this site and get your own random seed, too.
https://itemrando.supermetroid.run/randomize