any BW2 tier, even BW2 OU. So much creativity, back to an era where GF didn't screw up by debuffing steel, buffing the move that shall not be named, debuffing (thunder, hydro, blizzard, etc.) and where a ton of different things were possible due to things like gems. BW2 RU and LC would have to be my favorite BW2 Tiers, as RU has a fantastic offensively-oriented metagame full of powerful things that aren't /too/ powerful but strong enough to make a dent. BW2 LC has a very set/item oriented metagame which is what I love about it. The unpredictability is not in the mons but directly situated in the item, and even though some people might think otherwise, I think it's much better than a majority of the XY tiers.