You’re welcome.
As for your question concerning clefable, don’t be silly, anon. They have to start out as gastly first and then evolve into gengar. No pokémon can just turn into the last member of a ghost evolutionary line! Why, that would be absolutely ridiculous. Furthermore, it’s not just clefable, either. All non-ghost pokémon do this.
Who even gave you this information? Eusine? It must have been Eusine. Ho-oh even knows where he gets his theories sometimes.