I got bored of drought and drizzle teams, so I decided to see if Tyranitar could match it with the big boys. So far he hasn't disappointed me.
Often I find myself in bad positions, losing horribly to the other team, only to get screens up and sweep to victory with my last pokemon.
Sandstream
Sassy nature 252 Hp / 200 SpD / 56 Att
Crunch
Pursuit
Fire blast
Superpower
Tyranitar is my favourite pokemon, and i'm always looking for a way to include it on my teams. Its purpose here is to set up weather for my team - sandstorm is a nice anti-weather in ubers. Lum berry is the item of choice to catch opposing lead Darkrai out with superpower (Darkrais focus blast will not OHKO). Even without choice band, pursuit is still very useful against low health ubers that are choice locked into a neutral move, such as thunder, ice beam or a fire move. Tyranitar acts as a decent check to Reshiram, which when coupled with its weather inducing ability, is more than enough reason to use him on a ubers team.
Sandstream is very useful on a lead, as it breaks the opposing leads focus sash. Vs Kyogore or Groudon leads I just switch out to the appropriate counter (Ferrothorn or Gliscor), and because Tyranitar is so slow I will have the weather on my side.
Poison heal
Jolly nature 252 Hp / 40 Def / 216 Spe
Taunt
Substitute
Protect
Toxic
I use this guy to counter Groudon. That is it really. Such is the prevalance of Groudon, and such is my teams weakness to Groudon; that is all he really needs to be able to do. Groudons dragon tail can't break Gliscors sub and Gliscor can toxic stall Groudon to death with its poison heal ability. I run taunt over earthquake so forretress cannot switch in and use Gliscor as set-up bait. It does make Gliscor taunt bait himself, but Gliscor cannot do much damage to opposing ubers anyway.
Works much better in reality than it does on paper, and most opponents have no idea what move set i'm running and often under-estimate the flying scorpion.
Iron thorns
Sassy nature 252 Hp / 180 SpD / 76 Def
Power whip
ThunderWave
Leech seed
Stealth rock
It took me a while to settle on the set I would use on this guy. What works best in theory doesn't always work best in practice.
I run thunderwave over toxic because Ferrothorn is primarily countering Kyogore, and i find it cripples most fast pokes a lot more than gyro ball does. Thunderwave on the opponents switching-in Forretress isn't a complete waste. I run Leech seed because it drains around 100 health off Blissey/Chansey, and along with leftovers this is more healing than seismic toss does damage. I needed a stealth rocker on my team to help rack up damage along with sandstorm, and powerwhip > gyro ball because it hits Groudon and Kyogore hard.
Pressure
Careful nature 252 Hp / 248 SpD / 8 Spe
Outrage
SleepTalk
Rest
Bulk up
Dialga is my teams status absorber and my largest attacking threat. In practice this pokemon is very tough to counter and very unpredictable. It can even set up a bulk up in a support Groudons face and laugh as Earthquake only does around 1/3 damage. The 8 speed EVs are there to outspeed 0 speed Groudon. This guy has no real checks once it has set up besides aura sphere Mewtwo or specs Reshiram. I generally save Dialga for last, hoping that anything that can deal with it has fainted and so it cannot be phazed by whirlwind/dragontail. Even if Lugia switches in to phaze it, it is still going to get hit with a bulk up boosted outrage before the negative priority phazing move hits. Behind light screen and reflect it is game-over for my opponent.
Pressure
Timid nature 208 Hp / 252 Spe / 50 SpD
Reflect
Light screen
Self destruct
Ice beam
I run a timid nature with max speed to at least tie with other Mewtwo and to outspeed Darkrai and Arceus. Mewtwos role here is to set up screens late game and pave the way for either Dialga or Arceus to sweep. Behind screens either one of those set-up monsters is unstoppable. Dialga works well against stall teams - resists stealth rock, is immune to toxic spikes and his low speed isn't really an issue vs stall; whereas Arceus's extremespeed nails offensive teams. I will generally try to save Mewtwo and what I feel is the appropriate sweeper to be my last two pokemon; and just try to annoy the opposing team with my other four pokemon.
This Mewtwo catches most people off guard, and often gets free turns of set up vs special walls. I make sure I have a good look at the opposing team in team preview to see what their Mewtwo counter may be, and what Dialga and Arceus have to watch out for most, to help me decide if I light screen or reflect first. After a light screen even specs Kyogores waterspout will not OHKO, and scarf Kyogores waterspout will not 2HKO even with stealth rocks up.
I used to run recover over self destruct, but once screens are up I often want to switch to a sweeper anyway, and if Mewtwo is one of my last 2 pokemon I don't want the opponent to be able to phaze my sweeper.
In the rare case the opposing team has an arceus with perish song (very rare), I just have to hope that 3 turns is enough to finish them off.
Multitype
Adamant nature 208 Hp / 28 Att / 116 Def / 156 SpD
Extremespeed
Earthquake
Shadow claw
Swords dance
The best physical sweeper in pokemon. Stab extremespeed is just too good to pass up. Lets Arceus act as a revenge-killer as well as a sweeper. A version of extreme-killer normal Arceus should be on every team unless there is a very strong reason to run an Arceus of another type. It is just that good.
My team really looks to put pressure on the other teams physically defensive pokemon and break through. Chansey/Blissey on the opposing team are pretty useless vs my team as I make no real use of special attackers. According to some people it is a cardinal sin to have a team with no special attackers, but in practice I find it does not hurt me.