My team of fail.

[Shiraishi]

I've been losing a lot lately D:

Medicham@Choice scarf
Adamant
252 Spd/252 Atk/4 HP
Psycho cut
Hi jump kick/Brick break
Ice punch
Thunderpunch

Cresselia@Leftovers
Calm
252 HP/100 Def/156 Sp def
Ice beam
Charge beam
Moonlight
Thunder Wave/Reflect

Ok. Cressy does not have outragous HP like Blissey does so I used Calm nature and pumped EVs into Sp def >_>

Donphan@Leftovers
Impish
252 HP/252 Def/4 Atk
Ice shard
Rapid spin
EQ
Stealth rock/Roar

Metagross@Shuca berry/Occa berry/Lefties
Adamant
252 Atk/104 Spd/152 HP
Meteor Mash
EQ
ThunderPunch
Agility

Agiligross ftw.

Gyarados@Lefties
Adamant
212 HP/16 Atk/180 Def/100 Spd
Waterfall
Stone edge
DD
Taunt

Gengar@Focus sash
Timid
252 sp atk/252 Spd/4 HP
Shadow ball
T-bolt
Hidden Power ice
Focus blast

Mock-bolt beam :x Lead.

My lack of Sp sweepers makes me wanna stick a mixed sweeper in there somewhere. 'Vire would work very nicely but Iunno who to replace.

[Samson]

moonlight is a horrible move. replace it for reflect.

agiligross has lost power this gen. =/ i'd give it something a little less predictable. maybe you should get rid of stealth rock on donphan and give it to meta. or maybe grass knot for bulky grounds. light screen and protect are also options worth considering just for the heck of it.

do you really need gyara? 3 physical sweepers is too much. you should get rid of him or Metagross for what you say you need -- a mixed sweeper. as a matter of fact, you could probably use someone with STAB Flamethrower and can inflict status. i suggest a Wide Lens mixed Infernape w/ WoW/Fire Blast/Stone Edge/(Close Combat VS Focus Blast VS Grass Knot).

you definitely need someone with grass knot, so you may want to consider that.

[Shiraishi]

Gyara is for water coverage, I can't live without it >.< :/ He's also the poke I use to kill Heracross when I see Megahorn coming X-x