Ability: Protean
EV Spread
252 Atk/252 Spe/4 Defense
-Hydro Pump
-Ice Beam
-Hidden Power Fire
-U-Turn
So the role of this bad boy is the lead and scout. Since he has such a diverse move set, he might also be able to knockout their leader effectively. Then use U-Turn and switch accordingly. Don't rely on him to much as a sweeper, as he will die eventually because of Life Orb. As far as his nature goes, it is really preference. Also, don't underestimate his ability of OHKO'ing with Water Pulse. But overall, Greninja is more of a scout.
Ninjask @ Leftovers
Ability: Speed Boost
Ev Spread-252 Spe/248 Hp/8 Def
-Protect
-Substitute
-Baton Pass
-Swords Dance
This Pokemons role in this team is the Setup for the Sweeper. He normally is used after Greninja scouts. Basically, his ability boosts his speed after every. Single. Turn. Using moves such as Substitute and Protect allow him to stall, increasing his Speed. If, at the end of a turn, if you find yourself behind a substitute, use swords dance! His Attack increases, and so does his Speed thanks to Speed Boost. Once you have his Speed and Attack maxed or nearly maxed, use a Baton Pass to pass these stat boosts on to your sweeper, making it nearly UNSTOPPABLE.
Ability:Drought
EV Spread: 252 Atk/252 Speed/4 HP
-Dragon Rush
-Dragon Claw
-Flamethrower
-Roost
Speaking of unstoppable, coming in at the 3rd spot of my team is the almighty Charizard X. When set up with Ninjask, this Sweeper can 6-0 unsuspecting teams easily. Honestly there's not much I can say about him except just hit hard, have fun.
Porygon-Z @Choice Specs
Ability:Download
EV Spread: 252 SpA/252 Hp/4 Spe
-Tri Atack
-Thunder
-Nasty Plot
-Ice Beam
Porygon-Z's role in this team is the special sweeper. Tri Attack, Choice Specs, Nasty Plot, and Download are such an unfair combo in terms of heavy hitting. It may seem odd that I included two heavy hitting sweepers in my team, but to be honest this team would be screwed without Porygon-Z.
Jirachi @ Leftovers
Ability: Serene Grace
EV Spread: 252 HP/252 SpD/4 Def
-Protect
-Iron Head
-Body Slam
-Wish
Jirachi serves as a very annoying staller for this team. He also has a bit of a medic role as I often use him to pass on wish to other almost dead Pokemon. However, the main idea of this Jirachi is to Paraflinch. Other Pokemon such as Stunfisk and Blissey are notorious for this feat, but Jirachi takes the cake when it comes to this special. Paraflinching is a combination of Paralyzing a Pokemon and constantly making it flinch. Jirachi's Serene Grace ability makes the chance of the attacks secondary doubled, so Iron Head is now a 60% chance at a flinch, and Body Slam is a 60% at Paralyzing. Pretty annoying.
Breloom @ Toxic Orb
Ability: Poison Heal
EV Spread: 252 HP/ 4 Atk/ 252 SpD
-Leech Seed
-Drain Punch
-Protect
-Spore
Breloom is the special attacker of the team. He's meant to stay alive for a long time, and to deal damage the entire time he is alive. First lay down a Spore, and while the Defending Pokemon is snoozing, use Leech Seed. Then Drain Punch until that suckers dead. Pretty straight up.
So that's it for the VG analysis of today. I'm fairly new to competitive VGing so if my team is absolutely crappy, drop a comment and tell me how it can be improved.