First of all, let me say that this is really a wi-fi team, so I can't use things like Hidden Power with any sort of reliability. Secondly, Gengar and Scizor have always been on my teams for as long as I can remember and are therefore non-negotiable.
The basic strategy of this team is to wear down the opponent with Stealth Rock and bulky pokemon to make way for an Electivire sweep. Generally speaking, any of the team members except for Celebi have the capability of sweeping if the opponent is slowed down with Thunder Wave, but I like to hold Electivire back till the end (unless an obvious Thunderbolt is coming towards my Gyarados) and then surprise people with him. Even unboosted, he's fairly fast.
Here we go.
Gyarados @ Leftovers
Intimidate
Adamant, 4 hp, 252 attack, 252 speed
-Dragon Dance
-Taunt
-Earthquake
-Stone Edge
My starter. Taunt is to shut down Stealth Rock and other sneaky moves, while Dragon Dance is to give him the capability for a sweep. I use him because it's great to have Intimidate on the team, and there are a number of things that only he can deal with. He's not Bulky, but I use Leftovers over Choice Band or Life Orb because I like him to stay around for a while; the more Intimidates I can use him for, the better. I'm not sure whether Stone Edge or Waterfall is better in the final slot.
Gengar @ Black Sludge
Levitate
Timid, 4 hp, 252 special attack, 252 speed
-Substitute
-Hypnosis
-Shadow Ball
-Focus Blast
Gengar is Gengar is Gengar. Back in Advance, I had special Ice Punch on him as my super secret tech against dragons, but alas, those days are gone. He requires very careful handling because of his fragility, but he can wreak a great deal of havoc if he isn't countered properly. On the advice of others, I have given him Substitute to try to stretch out Black Sludge and alleviate his weakness.
Scizor @ Life Orb
Technician
Adamant, 88 hp, 252 attack, 170 defence
-U-turn
-Pursuit
-Bullet Punch
-Brick Break
Ah, how I love my Scizor. A few explanations are in order: the EVs are for bulkiness rather than speed, and I prefer to use Life Orb over Choice Band because it gives me more options when staying in. I use Brick Break over Superpower for two reasons: 1) Superpower often negates even the possibility of a sweep, and 2) I fear Light Screen and Reflect. That being said, I don't use my Scizor as much of a sweeper, but more as a mid-game hatchet-man and general crippler of psychics. Nothing walks away from him unhurt.
Empoleon @ Leftovers
Torrent
Calm, 252 hp, 160 defence, 96 special defence
-Stealth Rock
-Surf
-Grass Knot
-Ice Beam
Empoleon has great defensive typing and a good special attack stat. He's easy to switch in, and he can take quite a beating once in. Because there are times when I know an opponent must run or die, Stealth Rock is on there to help wear down my opponent's pokemon for Electivire. If something looks to hit it with a Fighting or Ground attack, I can switch to Gyarados, and if it seems that an Electric attack is headed my way, I can bring in Electivire for the speed bost. This guy hits hard and is bulky as hell.
Celebi @ Leftovers
Natural Cure
Bold, 252 hp, 220 defence, 36 speed
-Thunder Wave
-Leech Seed
-Recover
-Grass Knot
I feel slightly bad about using such a cheap pokemon, but Leech Seed and Thunder Wave work wonders to weaken the opposition. With Grass Knot on this guy and Empoleon, I have little to fear from Swampert, and Leech Seed forces painful switches if I have SR up. Very durable, though he and Gengar must both worry about Pursuit (Gengar more than him). With Thunder Wave down, Empoleon, Scizor, and Electivire start outrunning the opposition, and that's a bad place to be in.
Electivire @ Expert Belt
Motor Drive
Adamant, 36 hp, 252 attack, 220 speed
-Earthquake
-Cross Chop
-Ice Punch
-ThunderPunch
He Beats Things Down. I can switch him in whenever people try to take advantage of Gyarados' or Empoleon's electric weakness, but I prefer to save him till the end and surprise a weakened, Thunder-waved team that isn't prepared for him. I decided to make him purely physical. Pretty standard, really, but people don't expect him.
So that's my team. I'd like to say I'm Heatran weak, and it's true that few things can switch into him safely, but Gyarados, Gengar, and Electivire can all lay some beats on him if they're in first. I'm a little shaky on Gyarados, but he covers a lot of things that my team is weak against and I do love Intimidate. I had been wanting to try the Weavile anti-lead with Fake Out, Taunt, Brick Break, and Ice Punch, but that would just have made my team even weaker to fire.
Prior to Empoleon, I used Rest-Talk Milotic, and while she was very nearly unkillable, her lack of power bothered me, so I changed to Empoleon for his great typing, strong power, and ability to SR. If it doesn't work out, I may switch back.
Please let me know if you spot any weaknesses or have any suggestions for me!
Edit: Gave Gengar Substitute and Hypnosis.
Edit: Replaced Electivire's Thunderbolt with ThunderPunch.
Edit: Changed Empoleon's Hydro Pump to Surf.
Edit: Made Empoleon Defensive.






The basic strategy of this team is to wear down the opponent with Stealth Rock and bulky pokemon to make way for an Electivire sweep. Generally speaking, any of the team members except for Celebi have the capability of sweeping if the opponent is slowed down with Thunder Wave, but I like to hold Electivire back till the end (unless an obvious Thunderbolt is coming towards my Gyarados) and then surprise people with him. Even unboosted, he's fairly fast.
Here we go.

Gyarados @ Leftovers
Intimidate
Adamant, 4 hp, 252 attack, 252 speed
-Dragon Dance
-Taunt
-Earthquake
-Stone Edge
My starter. Taunt is to shut down Stealth Rock and other sneaky moves, while Dragon Dance is to give him the capability for a sweep. I use him because it's great to have Intimidate on the team, and there are a number of things that only he can deal with. He's not Bulky, but I use Leftovers over Choice Band or Life Orb because I like him to stay around for a while; the more Intimidates I can use him for, the better. I'm not sure whether Stone Edge or Waterfall is better in the final slot.

Gengar @ Black Sludge
Levitate
Timid, 4 hp, 252 special attack, 252 speed
-Substitute
-Hypnosis
-Shadow Ball
-Focus Blast
Gengar is Gengar is Gengar. Back in Advance, I had special Ice Punch on him as my super secret tech against dragons, but alas, those days are gone. He requires very careful handling because of his fragility, but he can wreak a great deal of havoc if he isn't countered properly. On the advice of others, I have given him Substitute to try to stretch out Black Sludge and alleviate his weakness.

Scizor @ Life Orb
Technician
Adamant, 88 hp, 252 attack, 170 defence
-U-turn
-Pursuit
-Bullet Punch
-Brick Break
Ah, how I love my Scizor. A few explanations are in order: the EVs are for bulkiness rather than speed, and I prefer to use Life Orb over Choice Band because it gives me more options when staying in. I use Brick Break over Superpower for two reasons: 1) Superpower often negates even the possibility of a sweep, and 2) I fear Light Screen and Reflect. That being said, I don't use my Scizor as much of a sweeper, but more as a mid-game hatchet-man and general crippler of psychics. Nothing walks away from him unhurt.

Empoleon @ Leftovers
Torrent
Calm, 252 hp, 160 defence, 96 special defence
-Stealth Rock
-Surf
-Grass Knot
-Ice Beam
Empoleon has great defensive typing and a good special attack stat. He's easy to switch in, and he can take quite a beating once in. Because there are times when I know an opponent must run or die, Stealth Rock is on there to help wear down my opponent's pokemon for Electivire. If something looks to hit it with a Fighting or Ground attack, I can switch to Gyarados, and if it seems that an Electric attack is headed my way, I can bring in Electivire for the speed bost. This guy hits hard and is bulky as hell.

Celebi @ Leftovers
Natural Cure
Bold, 252 hp, 220 defence, 36 speed
-Thunder Wave
-Leech Seed
-Recover
-Grass Knot
I feel slightly bad about using such a cheap pokemon, but Leech Seed and Thunder Wave work wonders to weaken the opposition. With Grass Knot on this guy and Empoleon, I have little to fear from Swampert, and Leech Seed forces painful switches if I have SR up. Very durable, though he and Gengar must both worry about Pursuit (Gengar more than him). With Thunder Wave down, Empoleon, Scizor, and Electivire start outrunning the opposition, and that's a bad place to be in.

Electivire @ Expert Belt
Motor Drive
Adamant, 36 hp, 252 attack, 220 speed
-Earthquake
-Cross Chop
-Ice Punch
-ThunderPunch
He Beats Things Down. I can switch him in whenever people try to take advantage of Gyarados' or Empoleon's electric weakness, but I prefer to save him till the end and surprise a weakened, Thunder-waved team that isn't prepared for him. I decided to make him purely physical. Pretty standard, really, but people don't expect him.
So that's my team. I'd like to say I'm Heatran weak, and it's true that few things can switch into him safely, but Gyarados, Gengar, and Electivire can all lay some beats on him if they're in first. I'm a little shaky on Gyarados, but he covers a lot of things that my team is weak against and I do love Intimidate. I had been wanting to try the Weavile anti-lead with Fake Out, Taunt, Brick Break, and Ice Punch, but that would just have made my team even weaker to fire.
Prior to Empoleon, I used Rest-Talk Milotic, and while she was very nearly unkillable, her lack of power bothered me, so I changed to Empoleon for his great typing, strong power, and ability to SR. If it doesn't work out, I may switch back.
Please let me know if you spot any weaknesses or have any suggestions for me!
Edit: Gave Gengar Substitute and Hypnosis.
Edit: Replaced Electivire's Thunderbolt with ThunderPunch.
Edit: Changed Empoleon's Hydro Pump to Surf.
Edit: Made Empoleon Defensive.