Here's a team with which I have had an alright amount of success, but I still feel like it is lacking in some aspect. So I'm open for all suggestions.
The basic premise is that I'm not a big fan of walls. So the large majority of my Pokemon are some form of sweeper, even the more wall-ish ones. I'm also not a huge fan of choice sets, which is why you will not see any of those here.
Lead:
Zapdos @ Leftovers
Bold; Pressure
EVs: 252HP/220Def/38Spe
Thunderbolt
Heat Wave
Toxic
Roost
Stragety: Fairly simple. Bolt things that are weak to Electric, Heat Wave things that are Fire Weak. Toxic things that look like they're going to set up, and roost to keep up on HP. General purpose is to come in on physical attackers and ground attackers and Toxic them, maybe finish them off with a Bolt/Wave.
Weaknesses: Steel types that are also fire immune/resistant (Heatran, Bronzong) are tough to deal with because they cannot be Toxic'ed or Heat Waved. Thunderbolt still deals neutral and has STAB, however, so Zapdos is an OK switch in on a ChoiceTran, especially if you know he's quaking.
Crippler:
Spiritomb @ Leftovers
Careful; Pressure
EVs: 252HP/140SpA/108SpD
Pursuit
Will-O-Wisp
Pain Split
Shadow Ball
Stragety: Spiritomb comes in on Ghosts and Psychics to annihilate them with Pursuit, whether or not they switch out. Spiritomb comes in on physical attackers (preferably on a Normal or Fighting move) to cripple them with Burn. Pain split keeps HP up, and can take a decent chunk out of many walls. Shadow Ball is a decent all-purpose attack, good for picking off things that have lost HP to burn and pain split.
Weaknesses: Special attackers with decent defenses shrug off getting burned and can take out large chunks off Spiritomb's HP, often before Spiritomb gets a chance to Pain Split. Usually Spiritomb can cripple several Pokemon before biting the bullet if used wisely, however.
Paraflincher:
Togekiss @ Leftovers
Timid; Serene Grace
EVs: 252HP/192Spe/64SpD
Air Slash
Thunderwave
Nasty Plot
Baton Pass
Strategy: Thunderwave/Airslash makes for a fairly standard Paraflinch set. Nasty Plot can make it even more deadly, and Togekiss's durability pretty much guarantees it gets off. If Togekiss gets knocked low on HP, Baton Pass can send off that Plot boost to Zapdos, Spiritomb, or even Gyrados.
Weaknesses: Priority attackers don't mind so much getting Paralyzed, and can get in before flinch. Especially watch for Ice Sharders. Togekiss is Beefy enough that he won't get OHKO'd usually, but if you're not prepared it will prevent you from being able to BP to something else.
Note: Considering losing BP for Roost. I haven't had a lot of opportunity to BP Plots.
OH NO GYARADOS:
Gyrados @ Life Orb
Adamant; Intimidate
EVs: 74HP/252Att/184Spe
Dragon Dance
Waterfall
Ice Fang
Flamethrower
Strategy: Come in on a physical attacker (preferably an Earthquaker), Intimidate it into switching, Dragon Dance on the Switch, and proceed to sweep. Pretty basic. Flamethrower lets Gyarados break Physical Walls, especially as it hits some of the most common Physical Wall types.
Counters: Something bulky with a good Electric Move can make short work of Gyara, obviously, but against this build it has to have decent Special Defenses (and appropriate typing) or it eats a Flamethrower and dies too fast.
Silver Bullet:
Scizor @ Life Orb
Adamant; Technician
EVs: 252Att/255Def/6Spe
Swords Dance
Bullet Punch
X-Scissor
Brick Break
Strategy: Fairly basic since Platinum. Get him in on something you can SD against, and then proceed to Bullet Punch with Technician and STAB through everything that gets in your way. Brick Break and X-Scissor are for type coverage.
Weaknesses: Like Gyara, a 4x weak to something can leave Scissor in bad straights if something can come in and absorb his BPs and Flamethrower/Fire Fang him. Additionally, a faster Pokemon with a priority move can throw him completely on his head.
Mopper:
Breloom @ Toxic Orb
Jolly; Poison Heal
EVs: 252HP/252Spd/6Att
Spore
Substitute
Leech Seed
Focus Punch
Strategy: Fairly standard Breloom set, great for finishing off the last Pokemon or two on a team. If he comes in early, it will be just to get off a Spore (hopefully while absorbing a Toxic) and then switch out to allow Gyara or Scizor to set up. When it gets down to the last couple of guys, Spore, then Sub on the switch (if they've got a guy left they should switch, otherwise they pretty much just lose), then Focus Punch from behind the Sub to kill their switch-in. If he's resistant or Immune to Focus Punch, Leech seed instead and use Leech Seed + Poison Heal to be able to Sub every turn while staying at constant HP. If you are faster, you're basically guaranteed a kill at this point, at which point their Sleeping guy comes back in to get Seeded, Subbed, and Focus-Punched to death.
Weaknesses: Breloom has a bit of a problem with Pokemon who are a good deal faster than he is, especially if they pack a 4x Super Effective Flying move or even a regularly Super Effective Psychic, Fire, or Ice move (Ice Shard especially wrecks him). Sleep absorbers also give Breloom a good bit of trouble.
Overall strategy should be pretty aparent: drop status on opposing Pokes using Breloom, Zapdos, Togekiss, and Spiritomb in hopes of setting up an opening to set up with Togekiss, Scizor, or Gyarados for a sweep.
Overall strategy holes appear to be the lack of a Roarer, Rapid Spinner, Stealth Rocker, or Ice Sharder. Which just happens to sound like a Donphan set. Thoughts on who I could lose for a Donphan?
The basic premise is that I'm not a big fan of walls. So the large majority of my Pokemon are some form of sweeper, even the more wall-ish ones. I'm also not a huge fan of choice sets, which is why you will not see any of those here.
Lead:
Zapdos @ Leftovers
Bold; Pressure
EVs: 252HP/220Def/38Spe
Thunderbolt
Heat Wave
Toxic
Roost
Stragety: Fairly simple. Bolt things that are weak to Electric, Heat Wave things that are Fire Weak. Toxic things that look like they're going to set up, and roost to keep up on HP. General purpose is to come in on physical attackers and ground attackers and Toxic them, maybe finish them off with a Bolt/Wave.
Weaknesses: Steel types that are also fire immune/resistant (Heatran, Bronzong) are tough to deal with because they cannot be Toxic'ed or Heat Waved. Thunderbolt still deals neutral and has STAB, however, so Zapdos is an OK switch in on a ChoiceTran, especially if you know he's quaking.
Crippler:
Spiritomb @ Leftovers
Careful; Pressure
EVs: 252HP/140SpA/108SpD
Pursuit
Will-O-Wisp
Pain Split
Shadow Ball
Stragety: Spiritomb comes in on Ghosts and Psychics to annihilate them with Pursuit, whether or not they switch out. Spiritomb comes in on physical attackers (preferably on a Normal or Fighting move) to cripple them with Burn. Pain split keeps HP up, and can take a decent chunk out of many walls. Shadow Ball is a decent all-purpose attack, good for picking off things that have lost HP to burn and pain split.
Weaknesses: Special attackers with decent defenses shrug off getting burned and can take out large chunks off Spiritomb's HP, often before Spiritomb gets a chance to Pain Split. Usually Spiritomb can cripple several Pokemon before biting the bullet if used wisely, however.
Paraflincher:
Togekiss @ Leftovers
Timid; Serene Grace
EVs: 252HP/192Spe/64SpD
Air Slash
Thunderwave
Nasty Plot
Baton Pass
Strategy: Thunderwave/Airslash makes for a fairly standard Paraflinch set. Nasty Plot can make it even more deadly, and Togekiss's durability pretty much guarantees it gets off. If Togekiss gets knocked low on HP, Baton Pass can send off that Plot boost to Zapdos, Spiritomb, or even Gyrados.
Weaknesses: Priority attackers don't mind so much getting Paralyzed, and can get in before flinch. Especially watch for Ice Sharders. Togekiss is Beefy enough that he won't get OHKO'd usually, but if you're not prepared it will prevent you from being able to BP to something else.
Note: Considering losing BP for Roost. I haven't had a lot of opportunity to BP Plots.
OH NO GYARADOS:
Gyrados @ Life Orb
Adamant; Intimidate
EVs: 74HP/252Att/184Spe
Dragon Dance
Waterfall
Ice Fang
Flamethrower
Strategy: Come in on a physical attacker (preferably an Earthquaker), Intimidate it into switching, Dragon Dance on the Switch, and proceed to sweep. Pretty basic. Flamethrower lets Gyarados break Physical Walls, especially as it hits some of the most common Physical Wall types.
Counters: Something bulky with a good Electric Move can make short work of Gyara, obviously, but against this build it has to have decent Special Defenses (and appropriate typing) or it eats a Flamethrower and dies too fast.
Silver Bullet:
Scizor @ Life Orb
Adamant; Technician
EVs: 252Att/255Def/6Spe
Swords Dance
Bullet Punch
X-Scissor
Brick Break
Strategy: Fairly basic since Platinum. Get him in on something you can SD against, and then proceed to Bullet Punch with Technician and STAB through everything that gets in your way. Brick Break and X-Scissor are for type coverage.
Weaknesses: Like Gyara, a 4x weak to something can leave Scissor in bad straights if something can come in and absorb his BPs and Flamethrower/Fire Fang him. Additionally, a faster Pokemon with a priority move can throw him completely on his head.
Mopper:
Breloom @ Toxic Orb
Jolly; Poison Heal
EVs: 252HP/252Spd/6Att
Spore
Substitute
Leech Seed
Focus Punch
Strategy: Fairly standard Breloom set, great for finishing off the last Pokemon or two on a team. If he comes in early, it will be just to get off a Spore (hopefully while absorbing a Toxic) and then switch out to allow Gyara or Scizor to set up. When it gets down to the last couple of guys, Spore, then Sub on the switch (if they've got a guy left they should switch, otherwise they pretty much just lose), then Focus Punch from behind the Sub to kill their switch-in. If he's resistant or Immune to Focus Punch, Leech seed instead and use Leech Seed + Poison Heal to be able to Sub every turn while staying at constant HP. If you are faster, you're basically guaranteed a kill at this point, at which point their Sleeping guy comes back in to get Seeded, Subbed, and Focus-Punched to death.
Weaknesses: Breloom has a bit of a problem with Pokemon who are a good deal faster than he is, especially if they pack a 4x Super Effective Flying move or even a regularly Super Effective Psychic, Fire, or Ice move (Ice Shard especially wrecks him). Sleep absorbers also give Breloom a good bit of trouble.
Overall strategy should be pretty aparent: drop status on opposing Pokes using Breloom, Zapdos, Togekiss, and Spiritomb in hopes of setting up an opening to set up with Togekiss, Scizor, or Gyarados for a sweep.
Overall strategy holes appear to be the lack of a Roarer, Rapid Spinner, Stealth Rocker, or Ice Sharder. Which just happens to sound like a Donphan set. Thoughts on who I could lose for a Donphan?