I made a team on platinum and wanted someone elses opinion, here it is
(all of these pokemon have maxed out happiness and are level 100 and maxed stats)
Tyranitar=rock slide, crunch, thunderbolt, and aerial ace
(Item=hard stone) HP=339, Attack=326, Defense=252, Sp. Atk.=244, Sp. Def.=210, Speed=167 (sand stream) Dragonite=dragon claw, fly, flamethrower, and waterfall
(Item= dragon fang)HP=330, Attack=297, Defense=255, Sp. Atk.=249, Sp. Def.=239, Speed=221 (inner focus)
Haryama=brick break, poison jab, rock slide, and payback
(Item= fist plate) HP=433, Attack=284, Defense=194, Sp. Atk=111, Sp. Def.=144, Speed=136 (thick fat)
Snorlax=body slam, shadow ball, psychic, and yawn
(item=mind plate) HP=462, Attack=254, Defense= 164, Sp. Atk.=162, Sp. def=229, Speed=119 (immunity)
Wailord=surf, giga impact, ice beam, and earthquake
(item=splash plate) HP=475, Attack=240, Defense=139, Sp. Atk=232, Sp. Def.=101, Speed=153 (oblivious)
Torterra=earthquake, frenzy plant, energy ball, and rock slide
(item=Miracle seed) HP=310, Attack=277, Defense=250, Sp. Atk=204, Sp. Def.=199, Speed=174 (overgrow)

I would have to say that overall this is an impressive team. I don't know if this is a problem for you but your Snorlax has to Special Attack moves when it's Attack is a fair bit higher than it's Special Attack. If I may add a bit of advise I thought of 2 attack based moves that offer the same type coverage. In replace of Shadow ball you could teach Snorlax Crunch. At level 44 Snorlax learns Crunch so you may have to re-teach it through that guy in Pastoria City that re-teaches moves in exchange for a heart scale. If you don't have a heart scale or don't wish to use one you might have it's your choice.
In the place of Psychic (which might i add is a good choice of a move since Snorlax is weak to Fighting-types) you could tutor Snorlax Zen Headbutt. Ofcoarse you will need some shards so if you don't wish to use them or don't have enough that's fine.
All in all i think this is a good team.