To allow up to 255 tile changes on a map, change 2E517 and 2E521 to 0x5C. The only thing to mind is that tile change IDs after 127/0x7F cannot be triggered by map objects (chests, doors, villages) or broken walls/snags, but are fine to trigger by ID (and not coordinates) in events. This changes how many tile changes a map can have at most, it does not change the limit of 63 active traps on a map (tile changes are counted as traps). The game loads tile change IDs as signed, but this doesn’t make much sense since there aren’t negative tile changes, so this changed it to read the ID as unsigned, making the range go from -128/127 to 0/255.