v1.5 increased the size of GSaveLightMemory by 0xC each; with 160 entries, everything stored after this field (at 0x2F84) increased its offset by 0x780.
GSaveItemName ClothesPTops; // @0x14c size 0x8, align 4
s16 _58b5e808; // @0x154 size 0x2, align 2
s8 ClothesPTarget; // @0x156 size 0x1, align 1
Should be possible to convert the first revision of villager data to the current format and vice versa. Someone would need to document how they pre-fill these new fields (listed above).
Change friendship here.
Can also cheat all friendships (of all villagers, for all saved players) to 255 by shift clicking the drop-down button instead.
game stores all donation types in the same array (chunked into date[], item[], playerID[]); no dedicated indexes for a donation, so no empty slots, and all donation types are intermixed (based on donation date)