This is the team I've had for a couple years now. I've won many battles with it, but I have a feeling it has flaws here and there, so I'd like it to be rated by the experts. Just to let you know, my original strategy back then was every man/woman/thing for him/her/itself, so that may be the reason why my team doesn't have great synergy.
Electivire "All-out Suicide Starter" (♂)
Adamant @ Muscle Band/Expert Belt
Ability: Motor Drive (No DUH!!)
252 Attack/252 Speed/ 6 HP
-Earthquake
-Ice Punch
-Fire Punch
-Thunder Punch
Ah, the common staple Electivire. I decided to throw Fire Punch in there to hit Pokémon like Scizor and Heracross harder. Of course, without Cross Chop, that leaves me with nothing to annihilate Blissey, Snorlax and other Normal and Dark types, so I know there's a problem there. I also chose Muscle Band for those times when I can't land a super effective hit on a Pokémon, although Expert Belt and Cross Chop are way better than what I currently have. The EV spread is the classic 252/252. Again, this was in my n00b years where I didn't know much about EV spreads.
Blissey "The Aromatherapist" (♀)
Calm @ Leftovers
Ability: Natural Cure
252 HP/252 Sp. Defense/6 Defense
-Seismic Toss
-Aromatherapy
-Toxic
-Softboiled
Blissey, Blissey, Blissey... This thing hits Max HP and Max Sp. Defense, the perfect special wall. I'm really starting to think this thing's not living up to its full potential. So far, I have almost never used Aromatherapy, so I'm beginning to think it's a waste of a move slot. Seismic Toss is there to break fragile Substitutes and Toxic is there for well... Toxicity. Softboiled is a selfish means of recovery, so I'm beginning to think Wish should be there instead. This Special Skyscraper is just plain slaughtered by Gengar (I can't do SHIT to it), so there's an obvious flaw. Really need to work on her.
Dusknoir "The Shadow" (♂)
Impish @ Leftovers
Ability: Pressure
252 Defence/252 something/6 something
-Shadow Sneak
-Fire Punch
-Will-O-Wisp
-Pain Split
I forgot the EV spread for this guy. Dusknoir is my physical wall. Shadow Sneak is there to make up for its abysmal Speed. Fire Punch is there for the Normal types I can't hit with Shadow Sneak and for its type coverage. If this guy's a physical wall, Will-O-Wisp is there to make its job much easier, reducing the Attack stat of the broiled opponent. Pain Split is a 2-for-1 deal. It can heal Dusknoir and deal damage in the process. I don't think there's much wrong with this guy, except the EV spread.
Yanmega "The Blue Dragonfly" (♀)
Naive @ Wise Glasses
Ability: Tinted Lens (I couldn't get Speed Boost T^T)
252 Speed/252 Special Attack/ 6 Defense (Sensing a pattern here?)
-Psychic
-Bug Buzz
-AncientPower
-Air Slash
This one has a moveset a 10-year-old would apply on it. I got this blue (yes, it's Shiny) girl in a trade, so there wasn't much I could do about it. I decide I could give her a shot at glory, so eh, what the hell. I prefer Wise Glasses over Choice Specs because I don't like to be forced to switch all the time. I prefer move freedom. The moves, like I said, are the ones a little kid would want to put on any Pokémon for the "awesome type coverage." Obviously, my Yanmega fails. It needs to be worked on, but hey, it was, is, and will be my first team. Go easy on me D=
Absol "AKA Razr" (♀)
Adamant @ Scope Lens
Ability: Super Luck
252 Attack/ 252 Speed/ 6 something
-Swords Dance
-Psycho Cut
-Night Slash
-X-Scissor
Razr, the Shiny Absol. I basically want to set up a Swords Dance with her, but her fragility can mean her doom. She's all about Critical Hits. Psycho Cut, Night Slash and X-Scissor were the first moves with high critical-hit ratios to come to mind. I wouldn't really say she's great, but she sometimes helps me out when Electivire is down and out. With her out on the field, it's really just a game of chance: Land a critical hit and be one step closer to success or fail epicly and drive yourself into your own doom. Scope Lens + Super Luck + high critical-hit ratio moves should land critical hits a decent amount of times, no?
Porygon-Z "1337" (No Gender)
Timid @ Silk Scarf
Ability: Adaptability
252 Speed/ 252 Special Attack/ 6 HP
-Nasty Plot
-Tri Attack
-Dark Pulse
-Ice Beam
This guy/girl/thing is my all-out Special Attacker. Throw up a Nasty Plot and just hurl STAB/Silked/Adapted/Boosted Tri Attacks at anything that doesn't resist it. It's fragility could be a problem. Nasty Plot at the wrong time and it could be this thing's one way ticket to digital hell. Dark Pulse hits Ghosts and Ice Beam hits a variety of Pokémon. I'd say this thing can do its job very well once it manages to set up.
I'd like some feedback on this team. I know it's not the greatest, but again, I made it when Diamond and Pearl were barely released. It was during my n00b days so please don't flame me horribly if you must.

Electivire "All-out Suicide Starter" (♂)
Adamant @ Muscle Band/Expert Belt
Ability: Motor Drive (No DUH!!)
252 Attack/252 Speed/ 6 HP
-Earthquake
-Ice Punch
-Fire Punch
-Thunder Punch
Ah, the common staple Electivire. I decided to throw Fire Punch in there to hit Pokémon like Scizor and Heracross harder. Of course, without Cross Chop, that leaves me with nothing to annihilate Blissey, Snorlax and other Normal and Dark types, so I know there's a problem there. I also chose Muscle Band for those times when I can't land a super effective hit on a Pokémon, although Expert Belt and Cross Chop are way better than what I currently have. The EV spread is the classic 252/252. Again, this was in my n00b years where I didn't know much about EV spreads.

Blissey "The Aromatherapist" (♀)
Calm @ Leftovers
Ability: Natural Cure
252 HP/252 Sp. Defense/6 Defense
-Seismic Toss
-Aromatherapy
-Toxic
-Softboiled
Blissey, Blissey, Blissey... This thing hits Max HP and Max Sp. Defense, the perfect special wall. I'm really starting to think this thing's not living up to its full potential. So far, I have almost never used Aromatherapy, so I'm beginning to think it's a waste of a move slot. Seismic Toss is there to break fragile Substitutes and Toxic is there for well... Toxicity. Softboiled is a selfish means of recovery, so I'm beginning to think Wish should be there instead. This Special Skyscraper is just plain slaughtered by Gengar (I can't do SHIT to it), so there's an obvious flaw. Really need to work on her.

Dusknoir "The Shadow" (♂)
Impish @ Leftovers
Ability: Pressure
252 Defence/252 something/6 something
-Shadow Sneak
-Fire Punch
-Will-O-Wisp
-Pain Split
I forgot the EV spread for this guy. Dusknoir is my physical wall. Shadow Sneak is there to make up for its abysmal Speed. Fire Punch is there for the Normal types I can't hit with Shadow Sneak and for its type coverage. If this guy's a physical wall, Will-O-Wisp is there to make its job much easier, reducing the Attack stat of the broiled opponent. Pain Split is a 2-for-1 deal. It can heal Dusknoir and deal damage in the process. I don't think there's much wrong with this guy, except the EV spread.

Yanmega "The Blue Dragonfly" (♀)
Naive @ Wise Glasses
Ability: Tinted Lens (I couldn't get Speed Boost T^T)
252 Speed/252 Special Attack/ 6 Defense (Sensing a pattern here?)
-Psychic
-Bug Buzz
-AncientPower
-Air Slash
This one has a moveset a 10-year-old would apply on it. I got this blue (yes, it's Shiny) girl in a trade, so there wasn't much I could do about it. I decide I could give her a shot at glory, so eh, what the hell. I prefer Wise Glasses over Choice Specs because I don't like to be forced to switch all the time. I prefer move freedom. The moves, like I said, are the ones a little kid would want to put on any Pokémon for the "awesome type coverage." Obviously, my Yanmega fails. It needs to be worked on, but hey, it was, is, and will be my first team. Go easy on me D=

Absol "AKA Razr" (♀)
Adamant @ Scope Lens
Ability: Super Luck
252 Attack/ 252 Speed/ 6 something
-Swords Dance
-Psycho Cut
-Night Slash
-X-Scissor
Razr, the Shiny Absol. I basically want to set up a Swords Dance with her, but her fragility can mean her doom. She's all about Critical Hits. Psycho Cut, Night Slash and X-Scissor were the first moves with high critical-hit ratios to come to mind. I wouldn't really say she's great, but she sometimes helps me out when Electivire is down and out. With her out on the field, it's really just a game of chance: Land a critical hit and be one step closer to success or fail epicly and drive yourself into your own doom. Scope Lens + Super Luck + high critical-hit ratio moves should land critical hits a decent amount of times, no?

Porygon-Z "1337" (No Gender)
Timid @ Silk Scarf
Ability: Adaptability
252 Speed/ 252 Special Attack/ 6 HP
-Nasty Plot
-Tri Attack
-Dark Pulse
-Ice Beam
This guy/girl/thing is my all-out Special Attacker. Throw up a Nasty Plot and just hurl STAB/Silked/Adapted/Boosted Tri Attacks at anything that doesn't resist it. It's fragility could be a problem. Nasty Plot at the wrong time and it could be this thing's one way ticket to digital hell. Dark Pulse hits Ghosts and Ice Beam hits a variety of Pokémon. I'd say this thing can do its job very well once it manages to set up.
I'd like some feedback on this team. I know it's not the greatest, but again, I made it when Diamond and Pearl were barely released. It was during my n00b days so please don't flame me horribly if you must.