All the Darkrai/Giratina lists I've seen and played against don't run any cards to remove DCE once it's already been attached; So, as long as you get a DCE attached on your first turn, even a T1 Chaos Wheel on their part isn't enough to prevent Pitch-Black Spear. And once we get a Pitch-Black Spear off, Fighting Fury Belt can easily be not enough to prevent Yveltal-EX from knocking out the damaged (by 60) attackers. Garbodor is only helpful if they can get it out really fast (one interesting thing to note is that an online Garbodor means one less available Float Stone). This is because a single extra Pitch-Black Spear (unanswered by an immediate KO thanks to a Giratina-EX being stuck in the active with an offline Float Stone) is just too much to bounce back from. That Hydreigon idea is definitely interesting and actually could make some impact. Thanks for the heads-up, I'll have to watch out for that. Overall, though, from my testing against (typical) Darkrai/Giratina lists, I've found that as long as the Yveltal player can apply immediate pressure with Yveltal BT (which is quite easy to do) even optimal play on the Darkrai/Giratina player's part isn't enough.