Scattered throughout the fields are many Tauros and Bouffalants, all level 47, locked in combat. If you battle the Tauros, the Bouffalant will charge forward, potentially removing obstacles. If you battle the Bouffalant, the Tauros will let you ride it. While riding the Tauros, you cannot go through very tall grass, but can jump ledges.
If you head to the right after coming out of South Adventurine woods, and turn into one of the upper paths, you will find a house filled with Pikachu. Inside is Nyu who created the PC system in Reborn. He is a bit odd, but if you give him Candies or Ice creams will give you honey in return, but if you give him Blue Moon Ice Cream, he will give you either the Heracronite or Pinsirite (you can obtain both if you give him 2 Blue Moon Ice Cream).
You can also find a Pikachu who can teach Volt Tackle to a Pikachu.
Outside the house is a place you can plant three berries as well.
There is apparently a Miltank being wooed by a Tauros near the middle of the route. Miltank doesn't notice the poor Tauros, but will notice you if you hold an Oran berry. If given an Oran berry, Miltank will give the player a Moomoo Milk, a healing item that restores 100 health.
Right above the main gates, you will find the breeding center responsible for studying all the Pokemon in the region. Speaking to the people will give you loads of interesting information, and a sidequest to find one of the techies' glasses.