: Always create a backup of your original save files before attempting any edits to prevent permanent data loss. or a specific list of for the 3DS version?
Some advanced users use conversion scripts to turn PC 1.2-era save files into 3DS-compatible formats. Since the 3DS version is roughly equivalent to PC version 1.2.4, you can theoretically use an old PC inventory editor and then "down-port" the save, though this often leads to stability issues. Why 3DS Editing is Still Popular terraria 3ds inventory editor hot