[Feature Request] Backup and remove official NNID when switching to Pretendo/restore when switching back to Nintendo

[Dionicio3]

I was wondering if it would be possible to actually remove the NNID when switching to Pretendo. This could possibly fix error code 022-2571, aka not allowing you to have the same username on your NNID and PNID. I want to use the same username for both (I still plan to use Pokémon Bank after the online closure), but with how it currently works I cannot

[SnivySquid65]

Same here, can't do anything because of that error. Any way to temporarily delink NNID?