not sure how much special attack you run on p don, but i just run max HP 40 spdef. Sorry if it was a low roll
I was max Mild, but if you were running HP and some SpDef then it probs mattered a lot less, I assumed you were the standard Phys Def spread. Either way rolls are part of mons and it was a fun game so I don't really care, got faith in my fellow Bisharps to pull through =]
EDIT: using that spread, I actually got more or less a max roll lel, anyway gg and hope to play you again in future =]
252+ SpA Groudon-Primal Dragon Pulse vs. 252 HP / 40 SpD Giratina-O: 218-258 (43.2 - 51.1%) -- 5.9% chance to 2HKO
252+ SpA Groudon-Primal Dragon Pulse vs. 0 HP / 0 SpD Giratina-O: 226-268 (51.2 - 60.7%) -- guaranteed 2HKO