Page is currently hidden and under maintenance, I aim to bring them back online, in some form or another.
Edit: the page is partially back online
Edit 2: Correcting your misconceptions
As of time of writing, these are not in Pokémon GO.
While true, there are limitations.
Sure, you can inject these into your game, with changed OT, TID, SID.
But the moment you move them to other games with Pokémon HOME, their data will become invalid.
This is due to how HOME works. Read:
So if you want one that has your details, that is able to be transferred between games, you've gotta catch them in GO yourself, and transfer them to your own HOME account...