Question: can you transfer pokemon from crystal to ultra sun?
Answer: Not only can you have another fun adventure, but you'll also be able to transfer your favorite Pokémon from Pokémon Crystal into Pokémon Ultra Sun and Pokémon Ultra Moon using Pokémon Bank (and Poké Transporter). Many Pokémon you can catch in the wild in Pokémon Crystal can't be found in the Alola region.