Your pokemon team with level, stats and nature [if possible] and where you're currently leading too.!
Post your pokemon team so that people playing newly get some idea.! ;]

This was my first Diamond team.

Aggron @ Leftovers
Trait: Rock Head
Impish Nature (+Def, -SAtk)
252 Def / 252 HP / 6 atk
- Double-Edge
- Rest
- Protect / Substitute
- Taunt. Physical Wall.

Mamoswine @ Choice Band / Life Orb / Occa Berry
Trait: Snow Cloak
EV's: 56 HP / 252 Atk / 200 Spe
- Earthquake
- Light Screen
- Substitute
- Reflect / Stealth Rock. My own creative Set. Again. Also helps Aggron Wall tremoundously.

Grumpig @ Leftovers
Trait: Thick Fat
EV's: 252 SDef / 252 HP / 6 Def
Calm Nature (+SDef, -Atk)
- Psychic / Shadow Ball
- Thunder Wave
- Mirror Coat
- Payback. Helps Aggron Wall even more with T-Wave. I'm currently thinking Mirror Coat and Payback is reduandant... Psychic for the STAB. Shadow Ball gets a mention. And maybe Grass Knot.. Special Wall. Not creative. 0_o

Clefable (F) @ Life Orb
Trait: Magic Guard
EV's: 252 Atk / 252 Spd / 6 HP
Adamant Nature (+Atk, -SAtk)
- Meteor Mash
- Brick Break
- Wish / Encore
- Thunder Wave. The coolness of Physical Sweeping Clefable.

Skuntank @ Focus Sash
Trait: Aftermath
EV's: 252 Spd / 252 SAtk / 6 HP
Timid / Modest Nature
- Flamethrower
- Sludge Bomb
- Explosion
- Dark Pulse. I'm sure you get it by now. >3.

A good EV Inferinape can easily beat that !

I know, but it can survive some.