The only active ones are the X/Y and ORAS in-game tiers, and they are all on the Orange Islands board. The only one that might count as "thread necromancy" would be the B2W2 in-game tier, so ask a mod before posting there. There's also a revival of the RBY tier list, but I don't know much about it.
Do note that these threads are for constructing a tier list and generally not for getting people to rate your in-game team.
The older generations have finished lists, and you can consult those here: (this one is for the original Ruby, Sapphire, and Emerald)
http://www.smogon.com/ingame/misc/adv_rse_ingametiers