Well, this is the best team I've made so far. This team revolves around Scizor, the Red Lightning. Basically because I've realized he can beat almost anybody with a couple of sword's dance + bullet punch.
Baton pass speed+attack to scizor, then sweep with him.
Celebi @ Leftovers
Ability: Natural Care
4 HP / 252 Spd / 252 Sp. Atk
Celebi is there only to Stealth Rock. The rest of the attacks are to protect itself and to counter common leads like Azelf or Swampert, even an Aerodactyl.
Ninjask @ Focus Sash
Ability: Speed Boost
248 HP / 156 Atk / 104 Spd
Ninjask is ESSENTIAL in this team. With Focus Sash I can be sure 95% of the time that I will be able to Baton Pass 1 Swords Dance + 1 Speed Boost to Scizor (I'll explain Scizor in a bit.) It doesn't have the Speed EV's maxed out because with those it is faster than the second non-uber fastest pokémon: Electrode (and normally no one uses it.) Toxic if I'm having problems with someone, and X-Scissor to defend itself.
Red Lightning @ Metal Coat
252 Atk / 128 Def / 128 Sp. Def
The Red Lightning. Basically two Swords Dance's Baton Passed by Ninjask make this Scizor almost invencible. Believe me when I say that one Bullet Punch can OHKO almost anything, and since it attacks first.... Bug Bite is there to give more type coverage, and since Ninjask has Speed Boost, it also Baton Passes the two or three Speed increases. In case Ninjask is killed before fullfilling its goal, Scizor also has Swords Dance to increase its attack by itself, and Roost in case its health runs down. Maybe the Defence stats seem weird but I need to protect him from either a Flare Blitz or Flamethrower...it drives me paranoiac.
Starmie @ Focus Sash
Ability: Natural Care
4 Def / 252 Sp. Atk / 252 Spd
I know its weird to give so many jobs to one single pokémon...but i really didn't have a choice. Focus Sash is to be sure that at least the Rapid Spin will work. Reflect and Light Screen to support the rest of the party, it could be for protecting Ninjask and give it more time to use another Swords Dance or to protect either Rotom or Scizor from their respective weaknesses.
Dugtrio @ Focus Sash
Ability: Arena Trap
4 HP / 252 Atk / 252 Spd
Another one with Focus Sash, but I definitely need it for my worst nightmare made real: Infernape. That blazing monkey is the best counter for basically the whole team, so with Arena Trap he can`t get away from an OHKO Earthquake. Aerial Ace for extra covering and Endure + Reversal...well, you know that strategy. And since Dugtrio is pretty fast he can perform that well.
*Sorry for using this sprite as an image, i didn`t find a pic of Oven Rotom like the ones above.
Rotom @ Leftovers
HP 252 / 128 Spd / 128 Sp. Atk
First of all, I know it is extremely weird to give Rotom Sucker Punch, but it is there to protect it against a possible Gengar, which is not only faster than Rotom, but that can possibly OHKO it with Shadow Ball. Overheat is risky since it lowers Sp. Atk, so I use it only in two cases: Scizor & Bronzong. Aside from them, I don't really have a reason to use it...actually it will only make it weaker.
The only couple of things I'm not sure are the EV's for Scizor and Rotom and Ninjask's Toxic...I putted it there for "precaution", but I think there must be something much more better.