Charizard: Anti-Lead of sorts (I'm trachy, I have to have Charizard on my main team)
Item: Salac Berry
EVs: 6 Def, 252 Sp Attack, 252 Speed
IVs: 30 HP, 2 Attack, 30 Sp Attack
Flamethrower: Primary STAB attack.
Dragon Pulse: Coverage against Dragon types.
HP Grass: Coverage against Water and Rock mainly.
Substitute: Allows Charizard to get that Salac Berry boost and sweep the foe with ease.
Tyranitar: Sandstorm Activator
Item: Focus Sash
EVs: 6 HP, 252 Attack, 252 Sp Def
Earthquake: Great type coverage.
Stone Edge: STAB.
Fire Punch: Deals with Grass types and Bug/Steel types if Charizard is down.
Garchomp: Sand Sweeper
Item: Choice Scarf
EVs: 6 HP, 252 Attack, 252 Speed
Stone Edge: Type coverage.
Fire Fang: I really hate Bug/Steel type foes.
Outrage: Incredibly powerful STAB that makes use of Choice Scarf in that it is already locked into a move.
Metagross: Counter for many foes.
Item: Life Orb
EVs: 236 HP, 252 Attack, 22 Speed
Explosion: Some foes are too big of a threat and need to be taken down as soon as possible. Also good when Metagross is at low health and facing a slow foe.
Meteor Mash: Powerful STAB.
Earthquake: Good type coverage.
Thunderpunch: Mainly used to deal with Gyarados but deals with other Water types just fine. Also deals with other types of foes.
Swampert: The Water Type with only one weakness that draws out my foe's Alakazam for my Metagross to beat. Also a useful Tank.
EVs: 252 HP, 216 Def, 42 Sp Def
Earthquake: Powerful STAB attack.
Avalanche: This Swampert is going to be slow, so this is better than Ice Punch.
Curse: Increases Swampert's tanking abilities. Used to be Hammer Arm, but it didn't do enough damage to Blissey to warrent its use.
Sceptile: Special Sweeper/Sub-User
Item: Petaya Berry
EVs: 252 Speed, 252 Sp Attack, 6 Sp Def
IVs: 30 HP, 7 Attack, 30 Def, 30 Speed, 30 Sp Def
Substitute: Allows Sceptile to become incredibly powerful for one thing. Also protects from Status.
Energy Ball: Primary STAB move.
HP Rock: Deals with Sceptile's weaknesses.
Focus Blast: Type coverage.