Rate my team

[gengarbeast]

Breloom @ Toxic Orb
Physical Sweeper
Nature: Adamant
Ability: Poison Heal
EVs:252atk, 252speed, 4def
IVs:31atk, 31speed
-Spore
-Swords Dance
-Facade
-Brick Break/Super Power/Sky Uppercut
Used to Sweep

Gengar @ Life Orb
Special Sweeper
Nature: Modest
Ability: Levitate
EVs: 252SpA, 252speed, 4def
IVs: 31SpA, 31 speed
-Shadow Ball
-Thunderbolt
-Focus Blast
-Giga Drain
Used to Sweep

Dusknoir @ Leftovers
Tank
Nature: Impish
Ability: Pressure
EVs: 252hp, 252def, 4SpD
IVs: 31def,31sp.def,31hp
-Pain Split
-Will-O-Wisp
-Earthquake
-Fire Punch/Ice Punch/Thunderpunch
Used to stall

Skarmory @ Leftovers/Shed Shell
Spiker
Nature: Impish
Ability: Keen Eye
EVs: 252hp, 192def, 64speed
IVs: 31def, 31speed, 31hp
-Roost
-Spikes/ Stealth Rock
-Toxic/Whirlwind
-Drill Peck/Brave Bird
Sets up Spikes

Blissey @ Leftovers
Cleric
Nature: Calm
Ability: Natural Cure
EVs: 252def, 216 SpD, 40SpA
IVs: 31hp, 31def, 31sp.def
-Aromatherapy
-Ice Beam
-Thunder Wave/Toxic
-Softboiled
Used to heal team

Ambipom @ Lum Berry
Baton Passer
Nature: Jolly
Ability:Pickup/Technician
EVs: 252HP, 200def, 56speed
IVs: 31hp, 31def, 31speed
-Baton Pass
-Taunt
-Agility
-Nasty Plot
Used to make gengar and breloom sweep more effectivly

[R3I]

Uh, you might want to change the format a bit, because it's impossible to read.

Also, you should add more detailed descriptions, so that raters know what you're trying to pull off.

[Rookie]

Before constructing a team, you might want to use Marriland's team builder. Let's take a look at your weaknesses.

Spoiler

You have 2 weaknesses to fire and no resistances. That means a mixed infernape, or even a swords dance infernape is going to tear your team apart. Ambipom or Gengar might be able to revenge KO it, but once your opponent sees that they are your best option against infernape, they will instantly switch out so it can come back to get the rest of your team later. Vaporeon or latias would fit in your team well since they are the best counters to infernape(especially Vaporeon since she resists ice as well, another type you don't have covered). If you want to use the page I did to see your weaknesses here it is.

Pokemon.Marriland.com - Diamond / Pearl Team Builder

[R3I]

Rookie is definitely right about Infernape completely terrorizing your team.

What's worse is that you have a Modest Gengar, which means that it can't outrun Infernape. Dusknoir won't like a Life Orb boosted Overheat as well.

Maybe you should drop Ambipom for something that can check Infernape decently, such as a Latias. Gyarados works under most circumstances, but should Infernape carry ThunderPunch (which is definitely not unheard of), you're going to be in a tight spot.

[Nolie]

How does Infernape beat this team when it runs Gengar?

I'll say since Infernape is pretty much dead, it's not a huge problem to you.

An SD Breloom doesn't really fit in the world of leads all too well seeing how all common leads beat it quite easily. You could always make it a Scarf Breloom but that wouldn't even fit in too well because of the lack of use. I personally see this set working for you quite well:

Azelf@Choice Scarf|Naive Nature
40 Attack / 252 Special Attack / 216 Speed
U-Turn|Psychic|Flamethrower|Hidden Power [Ground]

This set does quite a few good things for you. First of all, it provides a second check to Infernape should you ever encounter one and Gengar is down. This set outspeeds Scarf Latias by just one point, which gives you the ability to switch in on Latias after a kill (or on Trick) and wear it down with U-Turn which will rack up some significant damage after a two U-Turns. Normally I wouldn't suggest a ground move or Psychic on a Scarf Pokemon because of Tyranitar and the number of set up levitaters but with U-Turn, Azelf has the chance to scout out these dangers before actually trying to use one of these moves.

You might want to use Timid over Modest on Gengar for the better chance to sweep as Nasty Plot boosts your Special Attack high enough anyway. Also Energy Ball is better than Giga Drain.

Dusknoir...eww just eww. I absolutely suggest you replace this. Something like Forretress would help a lot more. I absolutely suggest you change this.

I would consider at least one attack move on Ambipom so that it won't be completed walled. Fire Punch and Double Hit are good possiblities.

You absolutely need Shed Shell on Skamory so that a MagneScizor combo won't completely sweep your team. If Skarmory is trapped and killed by Magnezone, Scizor annihilates the rest of the team. Keep this all in mind.
Good luck with the team.

[R3I]

Sumeet, if you look closely, his Gengar is Modest.

And it'll still take considerable damage from Fire Blast, or Flare Blitz, or whatever.

[Nolie]

I caught that a little while later while writing my post so I recommended he change it to Timid. Thanks though.

[Sarcasjak]

Because you totally can't take out Gengar early then get an Ape sweep going.

[gengarbeast]

Ok i will consider giving gengar a timid nature but can't ambipom just pass him an agility?
and breloom isnt my lead sorry skarmory is. for energy ball, i want energy drain because it lets gengar keep at least some health that life orb takes away.

[R3I]

Originally Posted by gengarbeast

Ok i will consider giving gengar a timid nature but can't ambipom just pass him an agility?
and breloom isnt my lead sorry skarmory is. for energy ball, i want energy drain because it lets gengar keep at least some health that life orb takes away.

Yeah, but Giga Drain has a base power of 60, and without STAB, you're not going to be doing much damage to Swampert, the pokémon that you're probably intending to hit.