I'm pretty sure what he meant was that once your TTar Pursuited my Latios, now he can bring in any kind of sweeper to get free setup on the Pursuit locked TTar. Something like SubSalac or SubLiechi Terrakion can set up easily and proceed to sweep. I'm not saying this by pure theorymoning, but I've played a whole lot of these Lando + Ttar cores while I was testing the SubLiechi set with Rock Polish. If my Latios was ever revenged, I just brought in Terrakion and pproceeded to set up. However, I must be frank: the pressure and threat of CB Ttar was hugely influential in my decisions, and a few times I assumed a Ttar switch in and double switched my Latios, but they didn't bring out Ttar. Thus I conclude that though the core is threatening, it isn't unshakeable, and lots of sweepers can setup. Therefore I must ask that it should not be used as a counterargument against certain counters and checks. Personally I think Landorus should be suspected, but for now I don't think out I'd vote for its banning.