Though Pokémon Omega Ruby and Alpha Sapphire are remakes of games from the third generation, they retain changes made in later generations, such as the type split from the fourth generation and unlimited TM usage and triple battles from the fifth generation. They also retain most of the features of Pokémon X and Y, such as Mega Evolution and Super Training.
The games introduced new features including Primal Reversion for Groudon and Kyogre, as well as using Latios or Latias to fly around Hoenn. When flying around on Latios or Latias players may encounter "mirage spots". These spots feature Pokémon not otherwise available in the Hoenn region, as well as numerous legendary Pokémon from previous generations.