You know what? I'm going to actually build this team. How does it fair? I haven't done much about it, so I'm open to suggestions.

Arcanine (Intimidate)
<Leftovers/Modest>
(255 HP, 100 Def, 58 Sp. Atk, 100 Sp. Def)
~Flamethrower
~Crunch
~Extreme Speed
~Roar

Well, he does jack. Attack with Flamethrower and Crunch, and screw over low HP dwellers with Extreme Speed.

Marowak (Thick Head)
<Thick Club/Adamant>
(255 HP, 255 Atk)
~Earthquake
~Rock Slide
~Double Edge
~Swords Dance

Just attack.

Metagross
<Choice Band/Adamant>
(255 Atk, 255 Spd)
~Meteor Mash
~Earthquake
~Shadow Ball
~Explosion

Yes, I will have lots of fun with Choice Band.

Jumpluff
<Leftovers/Timid>
(255 HP, 255 Spd)
~Leech Seed
~Substitute
~Synthesis
~Sleep Powder

What I basically plan to do is use Sleep Powder to kill off my opponent's turn, and then SubSeed.

Latios
<Leftovers/Modest>
(255 Sp. Atk, 255 Spd)
~Psychic
~Dragon Claw
~Calm Mind
~Recover

Calm Mind and attack.

Blissey
<Leftovers/Bold>
(255 HP, 255 Def)
~Seismic Toss
~Softboiled
~Aromatherapy
~Counter

Yes...I finally caught this stupid Pokemon, or at least a Chansey...

So how does it look?

Generally, good.
2 things to note though,
1.)Marowak needs a baton pass from ninjask, otherwise it is quite weak.
2.)If you r gonna use leech seed on jumpluff, give it a low Hp, so no EPs in Hp.

Oh, I get it. So then Jumpluff will gain more percentage from Leech Seed? So I just split it down the middle in defences, right?