Hmm... maybe if I remove all the events in the map and redo them it'll work. I'll have to try it out later
Edit: I also thought about how to incorporate the mailman as into the storyline, because there's already mail items in the game. There are quite a few possibilities there, and if its (easily) possible, maybe the pc script could be altered so he has the item storage and the mailboxes have the pomemon storage or vice versa. Either way, the more I work on this game the more the story changes in smaller ways than whats on the first post. I should rewrite it soon, whenever I have wifi again.
I was thinking I should use one mail design for parchment and the rest as basic dungeon maps (without indication of where the player is but better than nothing). Maybe call it a treasure map and have the chest locations marked like they were in windwaker rather than the gameboy games? I also don't know how hard it'd be to call a blank piece of mail as a key item or something either... but I'm still brainstorming haha.
EDIT:
I tried removing all the warps and scripts from the map, changing some of the weather and such, still crashes upon entering... what a pain.