[OUTDATED], use: https://projectpokemon.org/home/tutorials/save-editing/using-pkhex/how-to-use-the-batch-editor-in-pkhex-r77/

Mass-Editor

This program is a mass editor for every Pokémon file you can read or create with PKHeX, so that you don't have to do it for several Pokémon manually!

How to use it:

• You just drag and drop the folders or files that should be edited into the free space
• Click on the changes you want to apply and configure it as much as you want
• After you configured everything the way you want it, you just click the big "Mass Edit" button and your Pokémon have been edited