These save files can be used to continue your game, or load up PB7 files to modify on PKHeX.
I've also modified the base saves from yuzu. I've also included a pack that has added in event flags from another save, to make it post E4 & Champion (not certain if these work tho).
For now, I've added variant language options for Let's Go Pikachu & Eevee saves,
all in the .rar named LG [version] more variety (modded)
Use PKHeX to change the Trainer Name, Rival Name, Trainer ID and Secret ID.
If you want unique manipulations of the look of your character (and you know hex editing), view this page.
Source for original files: https://github.com/yuzu-emu/yuzu-games-wiki