While Update 1.4 itself was a technical patch, it supports a game that added massive features to the original Hoenn experience:

: The update occupied approximately 250 to 270 blocks of storage on the Nintendo 3DS SD card.

: Mandatory for using the Player Search System (PSS), Wonder Trade, Game Sync, the Global Trade Station (GTS), and redeeming Mystery Gifts.

: The update contains "adjustments to make for a more fun gaming experience," which primarily consists of stability improvements and minor bug fixes.

Unofficially, dataminers and reverse-engineers quickly identified the changes:

Pokémon Omega Ruby Update 1.4 is not flashy. It adds no new explorable areas, no new music, and no new cutscenes. But it is arguably the most important stability patch for the entire Gen 6 suite.

: Installing this update will not delete your save data.