This sets up most of the content necessary for Galarian Articuno's event. In SwSh, it has 2 copies, so I'm doing that here too.
Right now, the fight doesn't work properly and the copies don't hide properly. Otherwise, it's roughly how we want it to be.
I messed up Garnet Cavern's 2F name for some reason
Also added all the warps which are, ironically, exactly the same as the international Cerulean Cave. Added the event for Galarian Articuno but gee I hope the constant skip doesn't cause any issues
Currently just uses the RG Unknown Dungeon map, which should be changed accordingly. The warps and stuff outside of basic entry aren't implemented.
Has a halved encounter rate compared to other maps, which matches the idea that caverns don't sustain much wildlife.
Mt Moon theme may not be used in the final product.
