Making a team with 12 Pokemon to choose from

[Exploited138]

Hey guys, just looking for some advice on which of my competitive Pokemon are best, or which ones would work best with each other on a Singles team. NO TIERS. I have 12 Pokemon with 5-6 IVs, fully EV trained, and ready to rock (Though my Tyranitar could use a few tweaks) Anyway, here's what I have:

Breloom (F) @ Focus Sash
Ability: Technician
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Spore
- Swords Dance
- Mach Punch
- Bullet Seed

Greninja (M) @ Life Orb
Ability: Protean
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Scald
- Dark Pulse
- Grass Knot
- Ice Beam

Talonflame (M) @ Leftovers
Ability: Gale Wings
EVs: 196 HP / 252 Atk / 60 Spe (Currently running 252 Atk & 252 Spe, I came to my senses though)
Adamant Nature
- Brave Bird
- Flare Blitz
- U-turn
- Roost

Excadrill (M) @ Air Balloon
Ability: Mold Breaker
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Iron Head
- Earthquake
- Rock Slide
- Rapid Spin

Clefable (F) @ Leftovers
Ability: Magic Guard
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
- Calm Mind
- Moonlight
- Moonblast
- Flamethrower
(I REALLY want to fit Heal Bell on this somehow. Suggestions?)

Gengar (M) @ Gengarite
Ability: Shadow Tag
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Shadow Ball
- Sludge Bomb
- Dazzling Gleam
- Destiny Bond

Skarmory (M) @ Rocky Helmet
Ability: Sturdy
EVs: 252 HP / 252 Def / 4 Spe
Impish Nature
- Stealth Rock
- Brave Bird
- Whirlwind
- Roost

Snorlax (M) @ Assault Vest
Ability: Thick Fat
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Return
- Earthquake
- Crunch
- Power-Up Punch

Dragonite (F) @ Weakness Policy/Lum Berry
Ability: Multiscale
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Dragon Dance
- Dragon Claw
- Fire Punch
- Roost
(I don't have access to Extreme Speed at the moment)

Blastoise (F) @ Blastoisinite
Ability: Mega Launcher
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
- Water Pulse
- Dark Pulse
- Ice Beam (Going to breed and replace this with Dragon Pulse)
- Rapid Spin (Going to breed and replace this with Aura Sphere)

Arcanine (F) @ Life Orb
Ability: Justified (Probably not the ideal ability, but I got impatient breeding. Might scratch her or re-breed)
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Flare Blitz
- Wild Charge
- Crunch
- Extreme Speed

This next Pokemon needs some work obviously. Going to re-do it's EVs and possibly make him a Mega.
If you have suggestions, please keep the Adamant nature in mind so I don't have to completely start over with him.

Tyranitar (M) @ Assault Vest
Ability: Sand Stream
EVs: 252 HP / 128 Atk / 128 Def
Adamant Nature
- Stone Edge
- Crunch
- Earthquake
- Ice Punch

So that's it, if you bothered to read through all this crap then I sincerely appreciate it. My team used to have a Kanto theme, but I've recently spread out a bit. So yeah, which of these 12 Pokemon do you think would work best in a team of 6? Any thoughts whatsoever would be a HUGE help! Thanks :D

 

[PlatinumDude]

Greninja pretty much needs Gunk Shot nowadays because that attack has the ability to let it deal with Fairy Pokemon, a type that Greninja struggled against in X/Y (to be more specific, Greninja's strongest attack against them at that point was Hydro Pump, and Fairies could easily shrug it off and retaliate). And speaking of Hydro Pump, if Greninja must use a Water STAB, the former should be used because Greninja is too frail to rely on the burn rate and the extra power is appreciated. Low Kick is also an option over the Water STAB to let Greninja hit Tyranitar and Heatran more reliably:
-Hydro Pump/Low Kick
-Ice Beam
-Gunk Shot
-Dark Pulse/Grass Knot/Hidden Power (Fire)/Extrasensory
Nature: Naive
EVs: 40 Atk/216 SAtk/252 Spe
Item: Lfie Orb
Ability: Protean

Better Talonflame sets below. Bulky Talonflame can get away with dropping Flare Blitz to make some attackers setup bait or to stallbreak:
-Swords Dance
-Flare Blitz
-Brave Bird/Acrobatics
-Roost
Nature: Jolly
EVs: 252 Atk/4 Def/252 Spe
Item: Sharp Beak/Sky Plate/none
Ability: Gale Wings

or
-Swords Dance
-Brave Bird/Acrobatics
-Taunt/Will-o-Wisp
-Roost
Nature: Adamant
EVs: 248 HP/252 Atk/8 Spe
Item: Leftovers/none
Ability: Gale Wings

or
-Flare Blitz
-Brave Bird
-U-turn
-Steel Wing/Tailwind
Nature: Adamant/Jolly
EVs: 252 Atk/4 Def/252 Spe
Item: Choice Band
Ability: Gale Wings

or
-Brave Bird/Acrobatics
-Bulk Up/Taunt
-Will-o-Wisp/Taunt
-Roost
Nature: Careful
EVs: 248 HP/252 SDef/8 Spe
Item: Leftovers/none
Ability: Gale Wings

If you want to use Heal Bell on Clefable, drop Flamethrower. Have other teammates handle Steel Pokemon if you plan on using Clefable. A Calm nature with 252 HP/172 Def/84 SDef, as weird as this sounds, allows Clefable to avoid the 2HKO from things like Thundurus' Thunderbolt and Jolly Mega Gyarados' Waterfall pre-Calm Mind.

Mega Kangaskhan does Power-Up Punch abuse much better because of Parental Bond. Snorlax is better off using:
-Return/Body Slam
-Earthquake
-Pursuit/Crunch
-Fire Punch/Crunch
Nature: Adamant
EVs: 252 Atk/252 Def/4 SDef
Item: Assault Vest
Ability: Thick Fat

Mega Tyranitar faces stiff competition from Mega Altaria, Mega Gyarados, and Mega Charizard X as a Dragon Dancer because even though Mega Tyranitar is very bulky, its common weaknesses (7 in fact) make this kind of problematic. You could make Mega Tyranitar work if your Mega slot isn't taken up:
-Stone Edge
-Crunch/Ice Punch
-Pursuit
-Superpower
Nature: Jolly/Adamant
EVs: 252 Atk/4 Def/252 Spe (Jolly) or 100 HP/252 Atk/156 Spe (Adamant)
Item: Choice Scarf (Jolly)/Choice Band (Adamant)
Ability: Sand Stream

or
-Stealth Rock
-Stone Edge
-Crunch/Ice Beam/Fire Blast
-Pursuit
Nature: Relaxed
EVs: 248 HP/80 Def/180 SDef
Item: Smooth Rock
Ability: Sand Stream

or
-Dragon Dance
-Stone Edge
-Crunch/Ice Punch
-Superpower/Fire Punch
Nature: Jolly
EVs: 252 Atk/4 Def/252 Spe
Item: Tyranitarite
Ability: Sand Stream

As for the team, I'd pick Tyranitar, Excadrill (use the Sand Rush variant with an Adamant nature), Talonflame, Poison Heal Breloom (you'll need to re-breed, though; it's better than Focus Sash Technician Breloom because Focus Sash will be broken in sandstorm, and if it gets used up during sandstorm, Breloom will be KOed after it attacks), Clefable (note that Moonlight's recovery will be hindered in sand), and Greninja.

Here's Poison Heal Breloom if you're interested:
-Swords Dance
-Seed Bomb
-Superpower/Drain Punch
-Facade/Mach Punch
Nature: Jolly
EVs: 12 HP/244 Atk/252 Spe
Item: Toxic Orb
Ability: Poison Heal

 

[Exploited138]

Groovy, thanks man. You actually picked all my favorites aside from T-Tar lol. I do have a 5 IV Jolly Shroomish but I ditched it because it had Poison Heal, so I'll consider raising it, however Tyranitar is forcing me to change so many things so I might go with a different sixth. I really like Mold Breaker on Excadrill and Technician Breloom. Took me forever to get a perfect one with Bullet Seed. I've actually already made most of the adjustments you mentioned, didn't take very long. Your help is once again much appreciated man, thanks. If you had to pick someone besides Tyranitar who would it be?

 

[PlatinumDude]

Groovy, thanks man. You actually picked all my favorites aside from T-Tar lol. I do have a 5 IV Jolly Shroomish but I ditched it because it had Poison Heal, so I'll consider raising it, however Tyranitar is forcing me to change so many things so I might go with a different sixth. I really like Mold Breaker on Excadrill and Technician Breloom. Took me forever to get a perfect one with Bullet Seed. I've actually already made most of the adjustments you mentioned, didn't take very long. Your help is once again much appreciated man, thanks. If you had to pick someone besides Tyranitar who would it be?

Sand Rush Excadrill is preferred if Tyranitar is on the team because Excadrill isn't that fast under normal circumstances. I would have gone with Dragonite if Tyranitar wasn't picked, but Mega Evolutions are highly recommended.