Currently replaying White2 and keeping up with my long running Black2.
White2 has a really impressive and powerful fixed team - they've each been with me from the moment I caught them:
Braviary, Heracross, Magnezone, Starmie, Camerupt and Weavile.
The Braviary is the Defiant one from Route 4. The Heracross is from the grotto in Lostlorn Forest, so it's Moxie. It's also female. It's also probably one of the luckiest catches I've ever made in a pokemon game. The rest are pretty standard.
Black2 has an oddball team that I put together the other day - it's very late in the post-game, and I'm just training and evolving and breeding things that I don't normally use:
Stunfisk, Shiftry, Cloyster, Hariyama, Gardevoir and Dragonite.
Stunfisk is my Surfer, which frees Cloyster up to be purely physical, with Skill Link and Shell Smash, Icicle Spear, Rock Blast and Razor Shell. Shiftry is just one I wanted to use - I've liked it since RSE, but hadn't used one yet in the fifth gen. It works pretty well now that it can get physical STABs, but it would be better with some better (and more appropriate, IMO) attacks - Leaf Blade and Night Slash would both make sense on a Grass/Dark with blade-shaped hands, but it doesn't learn either one. Hariyama is an old favorite, and this one is from a grotto, so it has Sheer Force. And Gardevoir and Dragonite are... Gardevoir and Dragonite.