This is my competitive team, any suggestions and changes will be appreciated and taken for thought.
Salamence@Life Orb
Naughty (+Atk, -SpDef)
EV's: 4 HP / 252 Atk / 252 Speed
-Dragon Claw
-Earthquake
-Flamethrower
-Roost
Weavile@Choice Band
Jolly (+Speed, -SpAtk)
EV's: 4 HP / 252 Atk / 252 Speed
-Ice Punch
-Brick Break
-Night Slash
-Pursuit
Dusknoir@Leftovers
Impish (+Def, -SpAtk)
EV's: 252 HP / 52 Def / 24 SpDef
-Shadow Punch
-Fire Punch
-Will-O-Wisp
-Pain Split
Porygon-Z@Life Orb
Modest (+SpAtk, -Atk)
EV's: 4 HP / 252 Speed / 252 SpAtk
-Nasty Plot
-Tri-Attack
-Dark Pulse
-Ice Beam
Skarmory@Leftovers
Impish (+Def, -SpAtk)
EV's: 252 HP / 204 Def / 52 Atk
-Drill Peck
-Stealth Rock
-Whirlwind
-Steel Wing
Snorlax@Leftovers
Careful (+SpDef, -SpAtk)
EV's: 140 HP / 116 Atk / 252 SpDef
-Body Slam
-Earthquake
-Rest
-Sleep Talk
Salamence@Life Orb
Naughty (+Atk, -SpDef)
EV's: 4 HP / 252 Atk / 252 Speed
-Dragon Claw
-Earthquake
-Flamethrower
-Roost
Weavile@Choice Band
Jolly (+Speed, -SpAtk)
EV's: 4 HP / 252 Atk / 252 Speed
-Ice Punch
-Brick Break
-Night Slash
-Pursuit
Dusknoir@Leftovers
Impish (+Def, -SpAtk)
EV's: 252 HP / 52 Def / 24 SpDef
-Shadow Punch
-Fire Punch
-Will-O-Wisp
-Pain Split
Porygon-Z@Life Orb
Modest (+SpAtk, -Atk)
EV's: 4 HP / 252 Speed / 252 SpAtk
-Nasty Plot
-Tri-Attack
-Dark Pulse
-Ice Beam
Skarmory@Leftovers
Impish (+Def, -SpAtk)
EV's: 252 HP / 204 Def / 52 Atk
-Drill Peck
-Stealth Rock
-Whirlwind
-Steel Wing
Snorlax@Leftovers
Careful (+SpDef, -SpAtk)
EV's: 140 HP / 116 Atk / 252 SpDef
-Body Slam
-Earthquake
-Rest
-Sleep Talk