A: No. The video is either a mod (like Eternal X or Mega X & Y ) or an edited simulation using Project Pokémon tools. New Mega Evolutions would require rewriting the game’s 3D models and battle engine – impossible in a simple update.
Download the (ensure it matches your ROM region: EUR or USA). Open Citra and go to File > Install CIA .
The search for “Pokémon X – Update 1.5 – Decrypted – 3DS – EUR/USA” is a wild goose chase born from mislabeled romhacks and outdated forum posts. The legitimate peak of Pokémon X/Y remains , released in December 2013.
If you have a file labeled "Update 1.5," it is likely a fan-made modification (ROM hack) , a mislabeled file, or a repack that includes the base game and the official v1.1 patch pre-installed. There is no official patch beyond version 1.1.
: This update is mandatory for all internet-based functions.