By making this post, I invite
frequent players of STABmons and especially the members of the
STABmons Battle Frontier to consider starting a discussion that will lead to
banning Chatter, the cancer of a move that it is.
Now, this may come off as sudden because Chatter has seen little to no usage in this tier. However, just like the King's Rock ban, every bit of uncompetitiveness should be removed regardless of how little it is used.
I am making this proposition after having a battle with
omnisc, who was using the said Cancer Chatter strategy. If you're going to mistake me for making this post after being butthurt from a loss, let me assure you: I won. But you have to realize that I use quite a number of bulky Pokémon and a Chansey (Whose Special Defense should come in handy with Chatter). Regardless, what should have been an easy breeze, instead turned out to be a long, drudging battle. And with a little bit of hax in favor of the opponent, I would have lost.
The best users are Pidgeot-Mega, Talonflame (Priority Confusion) and the worst of the worst, Thundurus (Access to Priority Substitute and Nasty Plot, Recovery via Oblivion Wing), all of which can use strategies that come close to being as bad as King's Rock flinching menace, or perhaps even worse.
http://replay.pokemonshowdown.com/stabmons-207091269