Manetric
Looking beastly bro, Although I would say to use Flamethrower over Overheat here.
Also, Consider Wise Glasses or a Life orb or Leftovers over an Expert Belt, those really don't work super great, but it's your choice.
Rotom-F
I would put 64 in both defenses and 128 in HP to make better use of your Leftovers, but besides that he's looking great.
Electivire
I would just forget the Defensive Ev's and go all sweeper with this guy.
Wild Charge needs to be changed to Thunderpunch. He really can't handle the extra recoil from Life orb.
I would change his nature to Jolly for extra speed, due to you having that Life Orb bonus, but it's not vital ( Like his spirit ). And consider Cross Chop over Brick break, Lower accuracy moves hit more than they really should on PO.
Magnezone
I'd take 128 of your Defense Ev's and put them into his Sp Atk, you have Reflect.
Magnet Rise really doesn't work well with this guy, if someone plans on using something like earthquake on you, you most likely won't be fast enough to use Magnet Rise. Although it can be used, I just don't reccomend it. Perhaps use Light Screen for a Dual Screener to make more use of your Item. If you take this route, you can take 128 for your Sp Defense, and give him 252 Sp Atk, 128 Defense, 128 Sp Defense.
Galvantuala
I think I mispelled his name..
Nature: Naughty
EVs: 196 Atk / 128 SAtk / 184 Spd
Item: Wide lens is useless for a pokemon with all 100% accuracy moves who can have the ability compoundeyes :P go Life orb or Lefties
And Toxic really can't be pulled off here.
Maybe use Wild Charge ( Lefties ) or Volt Swich ( Life orb )
Zapdos
Looks fine, I love the Bigbird pic by the way.
Take the 255 out of Sp Atk and give it 252, now you have room for another 4 Ev's into a different Stat :]
Overall Team View
Waaay to much Special pokemon!
Use more Physical pokemon, and you'll be fine.
Anyone who takes out your Electivire and has a Blissey could wall through your whole team ( Even Galvantuala if you go with Volt Switch,
due to a Blissey being able to kill it without being hit by Sucker Punch )