Just backpack the sprites and upload them to your Pokemon projects! Backpack the "Game Data" sprite for comprehensive lists of Pokemon data, move data, item data, and more!
This was a terrible idea. I hope it's helpful for someone out there as crazy as me. If you want custom Pokemon, just add data to all the Pokemon data lists and costumes to the relevant sprites. Same goes for custom items, moves, TMs, TRs, Pokeballs, even custom natures. Have fun with it!