While the idea of saving hard drive space is appealing, downloading a "highly compressed repack" from an unofficial source comes with significant dangers. Here’s what you need to watch out for.
Short answer: No.
Long answer: While the desire to play Pokémon X is understandable—it is one of the best entries in the series, introducing the fairy type, the beautiful region of Kalos, and the compelling lore of AZ—searching for a "highly compressed download repack" is a minefield. pokemon x 3ds highly compressed download repack
Many low-quality repacks break the save encryption. You might play for 10 hours, defeat the Lumiose City Gym, and then find that your save file is corrupted. Since the repack edited the RomFS improperly, the save location conflicts, wasting your time. While the idea of saving hard drive space