One of my favorite dragons, even though it resembles an oversized vampire bat.
4 Sp Def EV's, so Porygon Z always gets a Physical Attack boost from Download. Yeah, I know, a low chance of that specific match, but what do you lose, by doing Sp Def, instead of Def, or HP? Nothing.
Role: Physical Sweeper
Nature: Adamant/Jolly
EV's: 252 Atk/4 Sp Def/252 Speed
Item: Power Herb
Ability: Infiltrator
Sky Attack-One turn via Power Herb+Stab
Outrage/Dragon Claw- Power vs Reliable
Acrobatics-Stab+x2 Power with no item
U-turn/Brick Break-Scout/Coverage
Yeah, sure it's atk, isn't as good as special, but it still hits fairly hard, and it's a set people don't see coming.
Obviously, meant to be saved until bulky physical walls and Fairy/Steel types are dealt with, but still a fun set.
Role: Rain Noivern (Special Sweeper)
Nature: Timid
EV's: 252 Sp Atk/4 Sp Def/52 Spe
Item:
Flyinum Z (Z-Hurricane)
Dragonium Z (Z-Draco Meteor)
Fightinium Z (Z-Focus Blast)
Choice Specs (Why not?)
Draco Meteor-Stab
Focus Blast/U Turn-Coverage/Scout
Hurricane-Stab+100 acc in Rain
U-Turn/HP Water-Scout/Rain Boosted Coverage
No fire type because Rain Dance is essential with this set. Using a Damp Rock on Drizzle Toad/Pelipper, to have it last longer, paired with Mega Swampert/Scizor to form a solid core.