Are you playing this on or a physical 3DS console ?
The official update for Pokémon Omega Ruby and Alpha Sapphire (ORAS) was released on April 22, 2015 , and is required for all online features, including trading and battling. Update Overview Version Number: 1.4 Size: Approximately 250 to 270 blocks . pokemon omega ruby 14 3ds rom upd
: This update was released alongside v1.5 for Pokémon X and Y , ensuring that all Generation VI games could communicate effectively for trading and battling. Are you playing this on or a physical 3DS console