How can I transfer Pokémon from Pokémon Sun to Pokémon X? [duplicate]
I downloaded Pokébank and I was able to transfer Pokémon from X to Sun but I can't transfer Pokémon from Sun to X. How do I trade from Sun back to X?
Solution 1:
You simply can't transfer Pokémon from Sun/Moon to X/Y.
Solution 2:
You can't. The only backwards compatible Pokémon games are those from Generation II (Gold, Silver and Crystal) via Time Capsule. From Generation III onwards Pokémon games are forwards compatible, but not backwards compatible. You can transfer Pokémon forth, but not back.