Yet another reason for Giratina to carry Dragon Pulse instead of Dragon Claw. Dragon Claw is seriously trash on it.
Well DClaw hits Lati@s and Palkia harder, so Giratina isn't gonna be switch in bait every time. Blissey isn't gonna deal with Latias forever.
It's more like this
Pulse advantages:
1) Dragon Pulse breaks Groudon's Substitutes
2) Very slight chance of 3HKOing an opposing Giratina, although you might want to scrap that since Pressure leaves you with only 8 PPs
3) Hits Mewtwo/Darkrai harder-not going to matter much though. Hasty Darkrai/Two takes almost the same from Dragon Claw anyways
Claw advantages:
1) Latios and Latias take harder from it. Latios can take over 80% from it.
2) Palkia takes a load from it-up to 71% if it's Hasty
3) You stand a better chance against Ho-oh. Dragon Pulse does lol to Ho-oh's base 154 SDef and Pressure kills it in the long run.
4) It obviously does more damage to Blissey. This, I note, is a very nice advantage, since WoW + Dragon Claw will force Blissey to Softboil constantly, whereas she laughs at Dragon Pulse
5) 24 PP > 16 PP