As of late 2024, the official Nintendo 3DS eShop is (shut down March 27, 2023). You cannot legally download Pokémon Y update 1.5 from Nintendo anymore.
If you see a file labeled “Pokemon Y v15,” it is likely a misnamed v1.5 file. Do not look for version 15.0 – it does not exist. The correct, file you need is the June 2016 release. pokemon y update 15 decrypted 3ds eur usa updated
Whether you are using a or EUR copy of Pokémon Y, the 1.5 update is region-specific. Ensure the update file matches your base game region to avoid errors or crashes upon launching. How to Install the Update Depending on your platform, the installation method varies: As of late 2024, the official Nintendo 3DS