As we see here, the menus have a brand new look to fit the rest of the game...
Some buildings have gotten redesigned to look less ugly...
And here we have the first new feature: displayed next to each stat is a letter representing how many EVs you have. It starts at Z and goes up to F, E, D, C, B, A, and finally S, going up a letter for every 32 EVs gained. Major props to DoesntKnowHowToPlay - I modified his IV display ASM to display EVs instead.
Another new feature is the Berry Garden, located north of Orange City. Remember the Berry Garden from Gen 6? Now you can plant any better, go do whatever for awhile, and come back to harvest MANY more berries than you started with.
What do you do with all those berries, though? Allow me to direct your attention to this building in Rainbow City.
At this location you can craft berries into blocks, poffins and puffs. This tasty treats have a variety effects, but many of them increase a particular EV. In addition a certain PokéSweet who previously evolved by level now evolves by doing a lot of baking in this place. Which Sweet is it?Aww, you can figure that out on your own.
All of these treats come with new item icons, courtesy of Channini. She's so good at this <3
NOTE: Make a save state before planting berries or making items from them. The code used to access the berry bag for selecting a berry in this way is slightly buggy.
Finally, if you were at all curious about what goes on behind the scenes, I recommend checking out this room in Rainbow City. A few neat things can be found! Oh, and speaking of Rainbow City, you no longer need to grab the Tea to get into Grapevine City, it unlocks automatically once you enter Rainbow City.