Who else thinks the Lati's are THE BEST DRAGONS EVAR? I think they're amazing becuase: They are the only psychic/dragon type pokemon, their signature moves Mist Ball and Luster Purge supports their already high SpD and SpA with their 50% chance of lowering their foes SpA and Spd stats respectively. With the opponents SpA lowered Latias can take more hits from the likes of Ice Beam Kyogre while Latios can take advantage of their lowered SpD to sweep much more easily the only problem being that their signature move has a pp of 5 (8 if you use Max PP) and the fact that they only have a 50% chance of lowering their stats which it isn't so bad if you think about it this way you don't like the 50% chance of not lowering their stats but your opponent doesn't like the other 50% chance lowering their stats not to mention that you damage them at the same time but if you don't want to use Mist Ball and Luster Purge you can swap them for Psychic and Calm Mind instead. Another thing thats great about them is their item
Soul Dew which raises their SpA and SpD by 50% raising Latias and Latios SpD And SpA to 538 combined with STAB Psychic and Dragon Pulse whos power increases to 135. A max SpA boosted by its nature (like modest) Lv.100 Latios holding Soul Dew does 166-196 damage with
Luster Purge to max SpD Nuetral Nature Blissey after lowering it's SpD once a 4HKO (assuming you're not lucky enough lower its SpD again and don't score any critical hits) on a 664 HP Blissey while Latias with max SpD (assuming it has a SpD boosting nature like calm) can Survive a blizzard from max SpA Nature Boosted Articuno with ease.