I got Brilliant Diamond today. I have yet to get my first gym badge. So far my team consists of Piplup and Shinx.
Edit: I'm now on my way to get the seventh badge. My team consists of Empoleon, Luxray, Houndoom, Toxicroak, Murkrow, and Hippowdon. I ended up naming them after Marvel Comics characters.
Empoleon - Namor
Luxray - Shocker
Houndoom - Sunfire
Toxicroak - X-23
Murkrow - Archangel
Hippowdon - Quake