Hi everyone, this is my first attempt at building a team around Mega Venusaur. It has worked very well so far, but I'd like to know your opinion to see if you'd change any details.
Gliscor @ Toxic Orb
Role: Lead and Status Absorber
Ability: Poison Heal
Careful Nature
EVs: 8 Def / 58 Spe / 200 SpD / 244 HP
-Knock Off
-Facade
-Stealth Rock
-Roost
Gliscor sports very respectable bulk and excellent typing, allowing it to make a perfect lead. Knock Off, besides of its main use, allows it to seriously damage Ghost and Psychic types. Facade is a great resource of power thanks to Toxic Orb; this item also provides a useful recovery and it cripples foes who use Trick. In addition, combined with Roost, makes Gliscor very annoying and hard to beat.
Cofagrigus @ Leftovers
Role: Physical Wall and Rapid Spin Blocker
Ability: Mummy
Bold Nature
EVs: 252 HP / 252 Def / 6 SpD
-Toxic Spikes
-Will-O-Wisp
-Hex
-Pain Split
Will-O-Wisp cripples physical attackers such as Mega Medicham and Mega Heracross, making them almost useless and greatly lowering their ability to threaten my team. Pain Split is Cofagrigus's only source of recovery outside of Leftovers. Toxic Spikes support also has the added bonus of powering up Hex. My doubt here is: should I invest more EVs on Special Defense?
Volcarona @ Life Orb
Role: Special Sweeper
Ability: Flame Body
Modest Nature
EVs: 252 SpA / 252 Spe / 4 HP
-Quiver Dance
-Fire Blast
-Bug Buzz
-Giga Drain
Quiver Dance allows Volcarona to set up for special sweeping. Fire Blast lacks accuracy, but it's a very powerful option. Bug Buzz deals great damage and bypasses substitute. Giga Drain is mandatory, as it's Volcarona's only option for recovering of the LO drawback, and it gives it great coverage against Rock, Ground and Water types. Some people recommended me to invest more EVs on HP, but I don't see why, since I need to outspeed my foes.
Gyarados @ Leftovers
Role: Mixed Wall
Ability: Intimidate
Careful Nature
EVs: 252 HP / 104 Def / 156 SpD
-Waterfall
-Roar
-Rest
-Sleep Talk
This beast is really hard to beat. Waterfall is the best option as the only damage dealing move, since it's STAB and has good power. Rest allows it to recover its full HP and getting rid of any status. Roar is excellent to force switches and get my foes crippled by Gliscor's and Cofagrigus' entry hazards.
Bisharp @ Assault Vest
Role: Defog blocker and late game sweeper
Ability: Defiant
Jolly Nature
EVs: 204 Atk / 52 SpD / 252 Spe
-Pursuit
-Iron Head
-Sucker Punch
-Low Kick
As I lack a defogger, I thought: "let's use Bisharp to, at least, annoy defoggers", getting a free 2x Attack boost to sweep without needing to use Swords Dance so it can comfortably hold an Assault Vest to compensate its weak Special Defense. Pursuit is a great move because most people will switch out to Bisharp. Low Kick deals great damage to common threats, such as Ferrothorn and Heatran. Iron Head and Sucker Punch for STAB.
Venusaur @ Venusaurite
Role: Tank
Ability: Thick Fat
Bold Nature
EVs: 248 HP / 96 Def/ 144 SpD / 20 Spe
-Sludge Bomb
-Giga Drain
-Synthesis
-Leech Seed
Mega Venusaur is blessed with its amazing ability, allowing it to take less damage from super effective Fire and Ice moves. Sludge Bomb is a great STAB and Fairy killer. Giga Drain, Synthesis and Leech Seed are the moves which make MV very hard to take down.

Gliscor @ Toxic Orb
Role: Lead and Status Absorber
Ability: Poison Heal
Careful Nature
EVs: 8 Def / 58 Spe / 200 SpD / 244 HP
-Knock Off
-Facade
-Stealth Rock
-Roost
Gliscor sports very respectable bulk and excellent typing, allowing it to make a perfect lead. Knock Off, besides of its main use, allows it to seriously damage Ghost and Psychic types. Facade is a great resource of power thanks to Toxic Orb; this item also provides a useful recovery and it cripples foes who use Trick. In addition, combined with Roost, makes Gliscor very annoying and hard to beat.


Cofagrigus @ Leftovers
Role: Physical Wall and Rapid Spin Blocker
Ability: Mummy
Bold Nature
EVs: 252 HP / 252 Def / 6 SpD
-Toxic Spikes
-Will-O-Wisp
-Hex
-Pain Split
Will-O-Wisp cripples physical attackers such as Mega Medicham and Mega Heracross, making them almost useless and greatly lowering their ability to threaten my team. Pain Split is Cofagrigus's only source of recovery outside of Leftovers. Toxic Spikes support also has the added bonus of powering up Hex. My doubt here is: should I invest more EVs on Special Defense?



Volcarona @ Life Orb
Role: Special Sweeper
Ability: Flame Body
Modest Nature
EVs: 252 SpA / 252 Spe / 4 HP
-Quiver Dance
-Fire Blast
-Bug Buzz
-Giga Drain
Quiver Dance allows Volcarona to set up for special sweeping. Fire Blast lacks accuracy, but it's a very powerful option. Bug Buzz deals great damage and bypasses substitute. Giga Drain is mandatory, as it's Volcarona's only option for recovering of the LO drawback, and it gives it great coverage against Rock, Ground and Water types. Some people recommended me to invest more EVs on HP, but I don't see why, since I need to outspeed my foes.




Gyarados @ Leftovers
Role: Mixed Wall
Ability: Intimidate
Careful Nature
EVs: 252 HP / 104 Def / 156 SpD
-Waterfall
-Roar
-Rest
-Sleep Talk
This beast is really hard to beat. Waterfall is the best option as the only damage dealing move, since it's STAB and has good power. Rest allows it to recover its full HP and getting rid of any status. Roar is excellent to force switches and get my foes crippled by Gliscor's and Cofagrigus' entry hazards.





Bisharp @ Assault Vest
Role: Defog blocker and late game sweeper
Ability: Defiant
Jolly Nature
EVs: 204 Atk / 52 SpD / 252 Spe
-Pursuit
-Iron Head
-Sucker Punch
-Low Kick
As I lack a defogger, I thought: "let's use Bisharp to, at least, annoy defoggers", getting a free 2x Attack boost to sweep without needing to use Swords Dance so it can comfortably hold an Assault Vest to compensate its weak Special Defense. Pursuit is a great move because most people will switch out to Bisharp. Low Kick deals great damage to common threats, such as Ferrothorn and Heatran. Iron Head and Sucker Punch for STAB.






Venusaur @ Venusaurite
Role: Tank
Ability: Thick Fat
Bold Nature
EVs: 248 HP / 96 Def/ 144 SpD / 20 Spe
-Sludge Bomb
-Giga Drain
-Synthesis
-Leech Seed
Mega Venusaur is blessed with its amazing ability, allowing it to take less damage from super effective Fire and Ice moves. Sludge Bomb is a great STAB and Fairy killer. Giga Drain, Synthesis and Leech Seed are the moves which make MV very hard to take down.