was the hyperbeam time travel super metroid glitch mentioned cause that was the craziest one i ever got to work but i could only do it with my actual cartage and snes which i sadly do not have anymore, and wouldn't work in an emulator which makes me think it might have been specific to the NA ROM.
i haven't been able to find a video of it either but i swear i did it i read it off gamefaqs for Christs sake and was like ''this is some total BS" but it worked.
for reference it was when you had all the beams ( maybe all the gear too) and you were in that beginning area of crateria that has you falling down the large vertical passage where there are lots of small purple platforms, grey walls and chozo's jumping from side to side except on the first way down there are no chozos cause you didn't trigger from the morph ball yet. you would fall all the way down on the right side and get to the furthest down platform touching the right wall above the right door (opposite this door is the bare wall you bust through after beating mother brain at the end) get on this platform and bomb it which leads to another door which is either a power bomb or super missile door.
in this next area is where the trick works and you had to go to inventory and switch on all beams and switch between spazer and plazma really fast like on off on with really strict timing ( not that strict though, i did this well before i played SF so its not frame specific) and it will highlight so all beams are on. then you couldn't fire the weapon outright because the game would just crash but you had to run and face point blank the door you came out from and fire so only the blast dissipating on the wall animation played. then when you escaped the room everything was reset to before you triggered morph ball.
I'll keep looking for a video.
edit: found it, i don't remember the speed boots glitch being a necessary part of this tho:
https://www.youtube.com/watch?v=dwHqruj-4Js