i do not know if anyone has realized this yet, but the one true counter to palkia is not grass arceus unless the palkia is a choice scarfer in wich case he will probably switch out... but in any case with theexception of the aforementioned CS palkia... jolly GARCHOMP is the the ultimate counter to palkia! the poor space god gets outran by garchomp and OHKOed buy a un orbed, unCBed dragon rush or outrage... GG palkia. i discovered this from my own experience by using my jolly garchomp, Alien, in uber battles, and not one palkia has successfully survived dragon rush from him, and his IV in-game LOW(342 attack at level 100). most would use outrage on garchomp for this purpose instead of outrage, and i would too if it was for palkia, just for safety's sakes