Wallace as Champion, Juan 8th Gym
Steven in Meteor Falls or replacing Wallace in Delta Episode
Fight both Team Magma and Aqua
Project AZOTH (whatever it is)
Jirachi obtainable
Gym Leaders have updated teams like Emerald
Game Corner replacement game
Gym Leader rematches
Battle Frontier
Phone function for the Pokenav Plus
The staircase in New Mauville accessible and leads somewhere
Safari Zone functions like it did beforehand
New Safari Zone areas like Emerald, with some extra Pokemon
New Megas (compatible with Z)
Trick House revamped with further puzzles to be equal to GBA games.
Trainer Tower
Primal Rayquaza
Berry Blending game is an option for better/more Pokeblocks.
Wifi Contests
Trainer customization
Any other new features that Z also has.