For a change of pace from my normal strategy of constantly changing team members, I started a new playthrough of Black 2 with the specific goal of using the same team through the entire game. This is the first time I've ever done that in any of the games (aside from one solo run).
Currently in Humilau City with seven badges, getting ready to challenge Marlon. The team, in the order I caught them, is:
Samurott, Lucario, Crobat, Jolteon, Flygon and Chandelure. They're all between level 44 and 48 (definitely overleveled by my normal standards).