It looks like you're referencing a search query related to — specifically a fan-updated version of Pokémon X in .cia format for use with custom firmware (like Luma3DS on a hacked 3DS).
This is the gray area. Dumping your own cartridge of Pokemon X to a CIA using GodMode9 on a 3DS is legal (in most jurisdictions as a backup). Downloading "Pokemon X 15 CIA Updated" from a random website is copyright infringement. pokemon x 15 cia updated
Here’s a short news-style article based on that headline. It looks like you're referencing a search query