14 Exclusive: Pokemon Omega Ruby Update

According to the Official Nintendo Support site, the update was roughly 250–270 blocks in size and focused on providing a "smoother gaming experience".

“You’ve been playing for 1,247 hours across 9 years. Do you remember the first Pokémon you ever caught? I do. A Poochyena. You named it ‘Rusty.’ You released it in 2016 to make space for a Groudon. It’s still waiting in the wild data. I’ve been talking to it.” pokemon omega ruby update 14 exclusive

The Ultimate Guide to Pokémon Omega Ruby Update 1.4: Exclusives and Critical Features According to the Official Nintendo Support site ,

Mandatory Connectivity: This patch was required to access all online features via the Player Search System (PSS), including Wonder Trade, GTS, and Game Sync. including Wonder Trade