This will be my first time attending the VGC and I'm really excited. Please offer any criticisms on my team!
Hydreigon (NN: Tryclyde)@ Life Orb
Timid
4 HP / 252 SpA / 252 Spe
Ability: Levitate
Dragon Pulse
Dark Pulse
Flamethrower
Surf
Conkledurr (NN: Bane)@ Flame Orb
Adament
120 HP / 252 Atk / 136 SpD
Ability: Guts
Payback
Drain Punch
Mach Punch
Protect
These are usually who I lead off with. Conkledurr will Protect the first turn to activate Flame Orb and his Guts ability. Hydreigon's Dark Pulse will knock out Trick Room users like Reuniclus and Musharna. Protect is also used to protect against Hydreigon's Surf. Flamethrower and Dragon pulse are for coverage. Drain Punch is to recover damage from Flame Orb. Mach Punch is to finish off weakened foes. Payback is for Ghosts and Psychics. I used to have Mienshao instead of Conkledurr but she was too frail for my liking.
Amoongus (NN: Toad) @ Black Sludge
Calm
252 HP / 56 Def / 200 SpD
Ability: Effect Spore
Spore
Anger Powder
Giga Drain
Protect
This is my annoyer and Anger Powder user. He's able to help Carracosta set up a Shell Smash. Giga Drain is so I don't get taunted and I have the ability to gain some HP back. Protect is to stall out Trick Room and weather if it gets set up. Effect Spore is a great ability if he gets hit with a physical attack. I use black sludge so if I do get tricked...it a useless item for the opponent and takes 1/16 of their life each turn.
Carracosta (NN: Leonardo)@ White Herb
Jolly
4 HP / 252 Atk / 252 Spe
Ability: Sturdy
Shell Smash
Aqua Jet
Rock Slide
Crunch
This is my set up pokemon and late game sweeper with Aqua Jet. Rock Slide is here again to hit both opponent pokemon. Crunch is for coverage against Phsycics and Ghosts. I used Sturdy to hopefully ensure a Shall Smash set up. I like to send him out with Amoonguss so he can use Anger Powder/Spore and allows Carracosta to set up. I use White Herb to restore his decent defense and special defense stats after a shell smash.
Backup #1:
Chandelure (NN: Lumiere) @ Focus Sash
Timid
4 HP / 252 SpA / 252 Spe
Ability: Flash fire
Flamethrower
Shadow Ball
Psychic
Energy Ball
This my backup starter to replace Hydreigon...I kinda like him a little bit more than Hydreigon. He isn't weak to fighters, has Psychic to take them out and has basically the same coverage. Shadow ball is for the Trick Roomers and other ghosts. Energy Ball is for grounds and waters. Focus Sash is to survive a hit and be able to hit back...hard.
Backup #2:
Whimsicott (NN: Q-Tip) @ Leftovers
Bold
Ability: Prankster
12 HP / 248 Def / 248 SpD
Leech Seed
Tailwind
Protect
Encore
This is my backup annoyer/supporter. Tailwind raises speed for a few turns and allows me to do some sweeping with Hydreigon and Chandelure. Leech Seed is to recover HP and make the opponent die a slow death. Protect is for scouting, stalling out weather and Trick Room, and letting Leech Seed/Leftovers recover lost HP. Encore is for annoying the hell out of my opponent(hopefully they don't have mental herb).
Any suggestions are welcome.

Hydreigon (NN: Tryclyde)@ Life Orb
Timid
4 HP / 252 SpA / 252 Spe
Ability: Levitate
Dragon Pulse
Dark Pulse
Flamethrower
Surf

Conkledurr (NN: Bane)@ Flame Orb
Adament
120 HP / 252 Atk / 136 SpD
Ability: Guts
Payback
Drain Punch
Mach Punch
Protect
These are usually who I lead off with. Conkledurr will Protect the first turn to activate Flame Orb and his Guts ability. Hydreigon's Dark Pulse will knock out Trick Room users like Reuniclus and Musharna. Protect is also used to protect against Hydreigon's Surf. Flamethrower and Dragon pulse are for coverage. Drain Punch is to recover damage from Flame Orb. Mach Punch is to finish off weakened foes. Payback is for Ghosts and Psychics. I used to have Mienshao instead of Conkledurr but she was too frail for my liking.

Amoongus (NN: Toad) @ Black Sludge
Calm
252 HP / 56 Def / 200 SpD
Ability: Effect Spore
Spore
Anger Powder
Giga Drain
Protect
This is my annoyer and Anger Powder user. He's able to help Carracosta set up a Shell Smash. Giga Drain is so I don't get taunted and I have the ability to gain some HP back. Protect is to stall out Trick Room and weather if it gets set up. Effect Spore is a great ability if he gets hit with a physical attack. I use black sludge so if I do get tricked...it a useless item for the opponent and takes 1/16 of their life each turn.

Carracosta (NN: Leonardo)@ White Herb
Jolly
4 HP / 252 Atk / 252 Spe
Ability: Sturdy
Shell Smash
Aqua Jet
Rock Slide
Crunch
This is my set up pokemon and late game sweeper with Aqua Jet. Rock Slide is here again to hit both opponent pokemon. Crunch is for coverage against Phsycics and Ghosts. I used Sturdy to hopefully ensure a Shall Smash set up. I like to send him out with Amoonguss so he can use Anger Powder/Spore and allows Carracosta to set up. I use White Herb to restore his decent defense and special defense stats after a shell smash.
Backup #1:

Chandelure (NN: Lumiere) @ Focus Sash
Timid
4 HP / 252 SpA / 252 Spe
Ability: Flash fire
Flamethrower
Shadow Ball
Psychic
Energy Ball
This my backup starter to replace Hydreigon...I kinda like him a little bit more than Hydreigon. He isn't weak to fighters, has Psychic to take them out and has basically the same coverage. Shadow ball is for the Trick Roomers and other ghosts. Energy Ball is for grounds and waters. Focus Sash is to survive a hit and be able to hit back...hard.
Backup #2:

Whimsicott (NN: Q-Tip) @ Leftovers
Bold
Ability: Prankster
12 HP / 248 Def / 248 SpD
Leech Seed
Tailwind
Protect
Encore
This is my backup annoyer/supporter. Tailwind raises speed for a few turns and allows me to do some sweeping with Hydreigon and Chandelure. Leech Seed is to recover HP and make the opponent die a slow death. Protect is for scouting, stalling out weather and Trick Room, and letting Leech Seed/Leftovers recover lost HP. Encore is for annoying the hell out of my opponent(hopefully they don't have mental herb).
Any suggestions are welcome.