The official patch notes from the Nintendo Support website and Nintendo eShop describe the update as including "various bugs fixed to provide a smoother gaming experience". Key refinements identified by the community include:
The term "decrypted" refers to game files modified to run on 3DS emulators like Citra or for use with custom firmware tools. Pokemon Omega Ruby: Update 1.4 [Decrypted] 3DS ...
Fixed a critical glitch introduced in previous versions that caused international Random Matches in the Battle Spot to crash after team selection. The official patch notes from the Nintendo Support
This update is necessary to access all online features, including Wonder Trade , Game Sync , the Global Trade Station (GTS) , and redeeming Mystery Gifts. Working with "Decrypted" Files including Wonder Trade