Deoxys-A: I hate to start out with a perfect, but he's fine.
Blaziken: I wouldn't run that set, it doesn't abuse Speed Boost enough. Here's my favorite set:
Blaziken @ Focus Sash
EVs: 252 Atk / 252 Spd / 4 HP
Trait: Speed Boost
- Swords Dance
- Blaze Kick / Fire Punch
- Hi Jump Kick
Simple. Protect every other turn to boost speed, SD to boost attack and hang on with the sash, then attack with STAB!
Forretress: Shed Shell should be replaced for Leftovers. And maximum Defense investment.
Giratina: No Restalk Status, if you get it again it could miss easily, or it could go onto a Pokemon that's already burned. Use something like Dragon Tail.
Blissey: Replace Toxic for Substitute to take status, and you already have T-spikes.
Kyurem-W: Run Choice Scarf, and Dragon Pulse over Draco Meteor.
I will add more as I think of it, I'm sort of in a hurry.