Will it be worth it to spend 2 turns of being struck with attacks while I prepare? Will I even live in that time? Lets say someone uses an attack that does medium damage. Will I faint before that or will Groudon be bulky enough to withstand it and unleash the ultimate rampage?According to the analysis, Dragon Claw is the preferred option because of the numerous dragon types in Ubers. It is more reliable against Rayquaza, Latios, and Palkia and does better damage against Giratina-O. But in my opinion, if you already have good dragon counters on your team, Swords Dance could be a lot more helpful. +2 Atk and Spe Groudon is unstoppable, unless a Stone Edge misses.