Genaller
Silver Soul
Well Ash is bound to get his first Ghost type once Rowlet becomes Decidueye (which will happen if for no other reason than Rowlet is the "bird" of the region and hence will likely fully evolve). My question might be broader than the topic of this thread though basically it's what Psychic, Steel and Fairy types do you think would be a good "fit" for Ash first amongst Alola Pokémon including Alolan forms and second amongst all known Pokémon uptill now.