This is a large-scale compression of KEP's current hide/show constants. RBY's works extremely oddly and is limited to 256 entries.
The problem with how RBY's hide/show stuff works, is that even though there are tons of unused constants, you...can't actually remove them. The constant list is tied to the hide/show data entries, so if you replace it with something else, well, now you just have two objects tied to the same constant. If you made the Route 2 item a boss, and someone picked up the item on Route 2, the boss would also disappear, and vice versa. So, we have to get creative.
I have reduced what we have to 248, but I think I miscounted when doing the funny list somewhere in the actual list when making sure the hex stuff is ok. Either that, or there's an error somewhere that Martha will, by some obscene miracle of humanity, discover. Anyway, this was achieved by turning multiple current overworld items into hidden ones, keeping them in the game whilst keeping to that all-important limit.
I also removed the items in Pokemon Tower 4F for this, just needed a little boost. Well, as you can see by the number, I technically didn't, I just miscounted like 20 times. Look, it's 10:11 PM, my stomach is in pain from an insane injection, and I don't even know if that map will come back, cut me some slack. Or add it back. You definitely can.
Alright, never put items after the floors. This is very, very bad, as it actually causes a myriad of problems whenever the game tries to assert the item list on its lonesome. Effectively, this has been adding floors. This caused the item descriptions to be offset by 21 spaces once you get to the TMs. The fact it worked before was a miracle.
Anyway, all considerations have been made when doing this, so it should all be just fine.
If you need to test if the items are ok, check the Up-Grade on Porygon, as it's the last in the list. Checks showed it was ok for me.
Also, Old Sea Chart now uses the localised name - Old Sea Map. This actually fits in-game, which is good.
I am 90% sure something will bug out, can't test the map right now for obvious reasons. Tested everything else, though.
Mostly copied data from Cinnabar Volcano while commenting out Vermillion Dock Mew info to move it.
Wild data has been added along with a fishing group, just dummied out slots.
Old Sea Chart is a clone of the Citrine Pass which is all it needs to be. It is obtainable near the truck.
* Update sign to bg_event #289
* Rename warp to warp_event
* Replace object to object_event
* Move warp macro parameter from warp x, y, id, map to warp_event x, y, map, id
