Can I change a Pokemons name after I selected no? Like if I said I didn't want to nickname a Abra and now I have second guesses is their a way to change its name?
Yes, if you evolved the Abra, once it evolves you may change its name. Source is Experience.
However, I have played through nearly the entire post-game, and still have not found any other way to change the nickname.
How to change your username How to add a user avatar Why was my post hidden? Question etiquette Flags vs Downvotes Anime FAQ Official PokemonDb League
Type a Pokemon name, type, move or ability to see instant results.