Yeah, Pachirisu sucks from a general point of view. It worked for Se Jun in '14, but now we're in VGC '15. Landorus and friends have joined the party, plus new heavy hitters like Mega Salamence and Terrakion can slay Pachirisu. Clefable, Togekiss, Amoonguss and even Volcarona are probably all better that Pachirisu.