OK, so this is my first RMT here in Smogon. I recently made a team with a FWG core, since they cover each other's weaknesses perfectly. I never really intended this team to be used in serious battles but after a few play testings this team actually exceeded my expectations, peaking at #61 in Smogon's server. Anyway without further ado, this is my team:
Heatran @ Air Balloon
Ability: Flash Fire
EVs: 252 SpA, 4 SpD, 252 Spe
Nature: Modest
-Fire Blast
-Earth Power
-Hidden Power Ice
-Roar
Comment: so Heatran is the first Pokemon in my FWG core. EVs and movesets are pretty much basic. I chose Modest over Timid for the extra firepower, and Heatran won't be outrunning many Pokemon with Timid anyway. The 3 attacking moves are for coverage, while Roar forces Volcarona out, which could otherwise pose some problems for my team. With his Air Balloon intact, he could also be a solid check for Dragons and Excadrill.
Jellicent @ Leftovers
Ability: Water Absorb
EVs: 248 HP, 216 Def, 44 Spe
Nature: Bold
-Scald
-Will-o-Wisp
-Recover
-Taunt
Jellicent is the second member of the FWG core. I originally used Starmie in this slot but issues with Fighting type attacks in my team forced me to switch to Jellicent. And from there things started to look better for my team. The reason why I opted for Scald and Will-o-Wisp together is because my team has currently no real counters for Taunt Gyarados, except for trying to burn it with repeated Scalds. Recover is obviously for recovery, and Taunt stops the opposing Pokemon from setting up.
Celebi @ Leftovers
Ability: Natural Cure
EVs: 252 HP, 224 SpA, 32 Spe
Nature: Modest
-Nasty Plot
-Psychic
-Giga Drain
-Hidden Power Fire
Comment: the last member of the FWG core, this slot was actually taken by Shaymin, but Celebi proved to be a lot more effective for my team thanks to its ability to counter Conkeldurr, who was quite troublesome for my team when he wasn't a team member yet (and thanks to Eggbert for suggesting this). Nasty Plot is used to boost Celebi's Sp. Attack to threatening levels, Psychic and Giga Drain are for STABs, and HP Fire is for destroying Ferrothorn and Scizor.
Skarmory @ Leftovers
Ability: Sturdy
EVs: 252 HP, 232 Def, 24 Spe
Nature: Impish
-Stealth Rock
-Roost
-Whirlwind
-Brave Bird
Comment: like every other team, this team needs something to stop Dragon types from wrecking havoc, and Skarmory easily fits that role. It also fits well to my team thanks to its Fire type weakness, which can be taken advantage of Heatran. I chose Stealth Rock instead of Spikes because unlike Spikes, SR hits even Flying and levitating Pokemon. Roost is for recovery, Whirlwind is for phazing out set-up sweepers, and Brave Bird is there in case a taunter comes in and shuts down Skarmory's other moves.
Tyranitar @ Choice Scarf
Ability: Sand Stream
EVs: 4 HP, 252 Atk, 252 Spe
Nature: Jolly
-Crunch
-Ice Punch
-Stone Edge
-Superpower
Comment: with the Lati twins looming in every corner, every team needs a check for them, and TTar quickly comes to mind. I just love how almost anyone seems surprised every time their fast and hard-hitting sweepers get outspeed by a seemingly slow Tyranitar. Without Choice Scarf, TTar can't reliably counter things like Thundurus and Gengar, since he doesn't like taking Focus Blasts at all. With a Scarf, those two goes down before they can even touch TTar.
Terrakion @ Air Balloon
Ability: Justified
EVs: 4 HP, 252 Atk, 252 Spe
Nature: Jolly
-Rock Polish
-Swords Dance
-Close Combat
-Stone Edge
Comment: Terrakion serves as my mid to late-game sweeper most of the time. IMO he is one of the best sweepers this generation has given us, in fact he already saved me in a lot of close end games already. The two boosting moves give me an option depending on the remaining Pokes my opponent has, while still retaining almost universal coverage with Stone Edge and Close Combat. Air Balloon lets me set up against Pokemon who can't destroy Terrakion with a non Ground type move.
Threats:
Gyarados: Jellicent and Skarmory can wall him, but the Taunter set can be a huge problem. Burning Gyara indirectly with Scald is the only thing I can do to stop it, otherwise it's gonna tear my team apart.
Gengar: Tyranitar can kill him effortlessly, but if he is behind a Substitute, it's either my Crunch is gonna be disabled or he's gonna kill Ttar with Focus Blast.
Reuniclus: Ttar needs a 2HKO to kill it with Crunch, but Reuniclus's Focus Blast is a clean OHKO. The Trick Room set is the most problematic, since I usually have to sacrifice 2, or occasionally even 3, to take him down.
Omastar: to tell you the truth, I have no counters to Shell Smash Omastar at all. Good thing Omastar is rarely used so I don't have to deal with him so often.
So there you go. Please rate my team. Comments, suggestions, and even violent reactions are welcome. XD

Heatran @ Air Balloon
Ability: Flash Fire
EVs: 252 SpA, 4 SpD, 252 Spe
Nature: Modest
-Fire Blast
-Earth Power
-Hidden Power Ice
-Roar
Comment: so Heatran is the first Pokemon in my FWG core. EVs and movesets are pretty much basic. I chose Modest over Timid for the extra firepower, and Heatran won't be outrunning many Pokemon with Timid anyway. The 3 attacking moves are for coverage, while Roar forces Volcarona out, which could otherwise pose some problems for my team. With his Air Balloon intact, he could also be a solid check for Dragons and Excadrill.

Jellicent @ Leftovers
Ability: Water Absorb
EVs: 248 HP, 216 Def, 44 Spe
Nature: Bold
-Scald
-Will-o-Wisp
-Recover
-Taunt
Jellicent is the second member of the FWG core. I originally used Starmie in this slot but issues with Fighting type attacks in my team forced me to switch to Jellicent. And from there things started to look better for my team. The reason why I opted for Scald and Will-o-Wisp together is because my team has currently no real counters for Taunt Gyarados, except for trying to burn it with repeated Scalds. Recover is obviously for recovery, and Taunt stops the opposing Pokemon from setting up.

Celebi @ Leftovers
Ability: Natural Cure
EVs: 252 HP, 224 SpA, 32 Spe
Nature: Modest
-Nasty Plot
-Psychic
-Giga Drain
-Hidden Power Fire
Comment: the last member of the FWG core, this slot was actually taken by Shaymin, but Celebi proved to be a lot more effective for my team thanks to its ability to counter Conkeldurr, who was quite troublesome for my team when he wasn't a team member yet (and thanks to Eggbert for suggesting this). Nasty Plot is used to boost Celebi's Sp. Attack to threatening levels, Psychic and Giga Drain are for STABs, and HP Fire is for destroying Ferrothorn and Scizor.

Skarmory @ Leftovers
Ability: Sturdy
EVs: 252 HP, 232 Def, 24 Spe
Nature: Impish
-Stealth Rock
-Roost
-Whirlwind
-Brave Bird
Comment: like every other team, this team needs something to stop Dragon types from wrecking havoc, and Skarmory easily fits that role. It also fits well to my team thanks to its Fire type weakness, which can be taken advantage of Heatran. I chose Stealth Rock instead of Spikes because unlike Spikes, SR hits even Flying and levitating Pokemon. Roost is for recovery, Whirlwind is for phazing out set-up sweepers, and Brave Bird is there in case a taunter comes in and shuts down Skarmory's other moves.

Tyranitar @ Choice Scarf
Ability: Sand Stream
EVs: 4 HP, 252 Atk, 252 Spe
Nature: Jolly
-Crunch
-Ice Punch
-Stone Edge
-Superpower
Comment: with the Lati twins looming in every corner, every team needs a check for them, and TTar quickly comes to mind. I just love how almost anyone seems surprised every time their fast and hard-hitting sweepers get outspeed by a seemingly slow Tyranitar. Without Choice Scarf, TTar can't reliably counter things like Thundurus and Gengar, since he doesn't like taking Focus Blasts at all. With a Scarf, those two goes down before they can even touch TTar.

Terrakion @ Air Balloon
Ability: Justified
EVs: 4 HP, 252 Atk, 252 Spe
Nature: Jolly
-Rock Polish
-Swords Dance
-Close Combat
-Stone Edge
Comment: Terrakion serves as my mid to late-game sweeper most of the time. IMO he is one of the best sweepers this generation has given us, in fact he already saved me in a lot of close end games already. The two boosting moves give me an option depending on the remaining Pokes my opponent has, while still retaining almost universal coverage with Stone Edge and Close Combat. Air Balloon lets me set up against Pokemon who can't destroy Terrakion with a non Ground type move.
Threats:
Gyarados: Jellicent and Skarmory can wall him, but the Taunter set can be a huge problem. Burning Gyara indirectly with Scald is the only thing I can do to stop it, otherwise it's gonna tear my team apart.
Gengar: Tyranitar can kill him effortlessly, but if he is behind a Substitute, it's either my Crunch is gonna be disabled or he's gonna kill Ttar with Focus Blast.
Reuniclus: Ttar needs a 2HKO to kill it with Crunch, but Reuniclus's Focus Blast is a clean OHKO. The Trick Room set is the most problematic, since I usually have to sacrifice 2, or occasionally even 3, to take him down.
Omastar: to tell you the truth, I have no counters to Shell Smash Omastar at all. Good thing Omastar is rarely used so I don't have to deal with him so often.
So there you go. Please rate my team. Comments, suggestions, and even violent reactions are welcome. XD