I walljump with the gravity suit, then change to the power suit, wait to see the morphball, change to gravity again, activate spider ball as soon as possible, zip gets stored.
You have to spam spiderball to avoid releasing the zip, there’s a cooldown of 26 frames (starts from deactivation) until the zip gets released on the 27th frame.
You can use it to go to the other side in an instant then spam the spiderball to keep the zip again.
Also, trying to move upwards is a nightmare because I can demorph in between spiderball activations and release the zip too.
There are two types of stored zip travel:
1° Move but avoid balljumping or reaching corners, zip will get released.
2° You can’t do balljumps and the zip gets constantly released whenever you try to move, so the ball gets sticked to the wall on the opposite side no matter what.
The stored zip can get through room transitions that are in a vertical position, if they are on a horizontal one the game crashes because the there’s no wall to stop Samus.
The reason I can do this is that whenever the zip gets released near a wall, Samus barely clips into a wall.
Which in this case turned out to be pretty useful since now I can climb the tile to clip even more and finally I activate the spider ball to go out of bounds.
I still have to find other places to use this but it’s incredibliy difficult and it’s usage is extremely limited.