4th Gen My first competitive team (Soulsilver)

Hi guys, I'd like you to rate my first team.
I'm new in the metagame so I think this isn't going to be a very powerful team, but I searched a lot of informations on the web and I think it's a quite good team.



Umbreon (Physical and Special wall)
Ability:Synchronise (Sincronismo)
Item:Shed shell (Disfoguscio)
Nature:Impish (Scaltra)
Evs: 252 Def, 252 SpDef, 4 Hp
Moveset:
Confuse Ray
Moonlight
Protect/Curse
Substitute/Last Resort/Faint Attack



Metagross (Physical Sweeper)
Ability: Clear body (Corpochiaro)
Item: Choice Band/Choice Scarf
Nature: Naughty (Birbona)
Evs: 252 Atk, 252 Speed, 4 Def
Moveset:
Meteor Mash
Bullet Punch
Magnet Rise
Zen Headbutt




Blissey (Cleric/Annoyer):
Ability:Natural Cure (Alternacura)
Item: Leftovers (Avanzi)
Nature:Bold (Sicura)
Evs: 252 Def, 252 SpDef, 4 Hp
Moveset:
Toxic 
Sing
Healing Wish
Softboiled




Tyranitar (Physical Sweeper)
Ability: Sandstream (Sabbiafiume)
Item: Wide Lens (Grande Lente)
Nature: Jolly (Allegra)
Evs: 252 Atk, 252 Speed, 4 Hp
Moveset:
Earthquake
Crunch
Dragon Dance
Stone Edge




Starmie (Special Sweeper)
Ability: Natural Cure (Alternacura)
Item: Choice Specs (Lentiscelta)
Nature:Impish (Scaltra)
Evs: 252 SpAtk, 252 Speed, 4 SpDef
Moveset:
Pshychic
Ice Beam
Thunderbolt
Surf




Dragonite (Mixed Sweeper)
Ability: Inner Focus (Fuocodentro)
Item: Life Orb (Assorbisfera)
Nature: Mild (Mite)
Evs: 56 Atk, 252 Sp.Atk, 200 Speed
Moveset: 
Draco Meteor
Flamethrower
Earthquake/Thunderbolt
Outrage/Thunderbolt


Thanks :)

Great team there DarkTyranitar!

Unfortunately, competitive team help threads don't belong in Fourth Gen but best belong in the Battle Center.

Good luck with your team and happy battling! C: