Riverside Champion Night

Her second version of Route 10 really good for calm atmosphere. My personal favorite.

I'm assuming you're looking for tracks of hers that aren't featured in Reborn's Audio folder. Here's a short list of some of my favorites in no particular order:

1.)  Cyrus Battle (ok, except for this one -- I'm absolutely in love with it)

2.)  Lusamine Battle

3.)  Weather Trio

4.)  X/Y Pokemon League

5.)  Meteor Falls

6.)  Search for the Girl

7.)  Aether Foundation

X and Y Pokeball Factory Remix is by far my favorite song in this entire game.