I've been trying to get up to speed with PkHex since being out of the game for a while, and I notice a lot of people saying to never modify the immutables.
With bank closing, I'm looking to do the exact same thing as OP, but I would like to be the OT for all Pokemon where it is legally possible. Is it possible to change the OT and related information to my own while still being seen as legal? I would anticipate doing this before they ever enter Home, so the Home tracker would be generated after the OT was changed.