I have a new rapid spinner and changed some more things:
Lucario-Mega (F) @ Lucarionite
Ability: Adaptability
EVs: 252 Spd / 252 SAtk / 4 HP
Timid Nature
- Aura Sphere
- Vacuum Wave
- Nasty Plot
-

Greninja @ Life Orb
Ability: Protean
Shiny: Yes
EVs: 4 Atk / 252 SAtk / 252 Spd
Hasty Nature
- Spikes
- Hydro Pump
- Dark Pulse
- Extrasensory

Rotom-Mow @ Choice Specs
Ability: Levitate
EVs: 48 HP / 252 SAtk / 208 Spd
Timid Nature
- Leaf Storm
- Volt Switch
- Will-O-Wisp
- Pain Split

Donphan @ Leftovers
Ability: Sturdy
EVs: 252 HP / 252 Def / 4 Spd
Impish Nature
- Rapid Spin
- Earthquake
- Ice Shard
- Stealth Rock

Talonflame @ Choice Band
Ability: Gale Wings
EVs: 252 Spd / 252 Atk / 4 HP
Jolly Nature
- Roost
- Acrobatics
- Brave Bird
- U-turn

Azumarill @ Sitrus Berry
Ability: Huge Power
EVs: 252 Atk / 252 HP / 4 SDef
Adamant Nature
- Belly Drum
- Aqua Jet
- Waterfall
- Play Rough  

Forretress @ Red Card
Ability: Sturdy
EVs: 112 Atk / 136 Def / 252 Hp
- Spikes
- Stealth Rock
- Rapid Spin
- Explosion

Gardevoir @ Mind Plate
Ability: Synchronize
EVs: 252 Atk / 4 Def / 252 Spd
- Psychic
- Calm Mind
- Moonblast
- Shadow Ball

Lucario-Mega @ Lucarionite
Ability: Adaptability
EVs: 252 Atk / 4 Def / 252 Spd
- Dark Pulse
- Close Combat
- Psychic
- Earthquake

Arcanine @ Life Orb
Ability: Intimidate
EVs: 72 HP / 252 Atk / 8 SDef / 176 Spd
- Flare Blitz
- Close Combat
- Wild Charge

Gyarados @ Leftovers
Ability: Intimidate
EVs: 252 Atk / 4 Def / 252 Spd
- Dragon Dance
- Stone Edge
- Waterfall
- Bounce

Vileplume @ Leftovers
Ability: Chlorophyll
EVs: 252 HP / 4 Def / 252 Spd
- Aromatherapy
- Energy Ball
- Sludge Bomb
- Sleep Powder

First real competitive team... any criticism appreciated.

http://www.marriland.com/tools/team-builder this is a pretty good tool when building a team btw  

I knew my Azumarill Sisters were good, but check out this battle I had just an hour ago!

RXTW-WWWW-WWW4-5ZZ3

One has 252 HP while the other one (The one in the video) has 252 Def.  

Whoops my Gardevoir has SPECIAL attack not attack.  

Posted by glogmaster

Tyranitar is really common on opposing teams which helps alot and why not have it?

edit: The only reason i have him for is because he is a rapid spinner

Excadrill otherwise doesn't add anything to your team except supplementing your Fighting-type weakness. The only one on your team that resists Fighting is TFlame, and he's so frail it's a nonfactor. I'd suggest LO Starmie over Excadrill if you want a spinner with offensive presence.  

http://replay.pokemonshowdown.com/ou-73942256 woot  

Posted by Sariss

Lucario-Mega @ Lucarionite
Ability: Adaptability
EVs: 252 Atk / 4 Def / 252 Spd
- Dark Pulse
- Close Combat
- Psychic
- Earthquake

First real competitive team... any criticism appreciated.

Take off Dark Pulse and Psychic, you're going for an offensive set and both are special attacks. Also, you can't start in Mega form anyway so it's better to keep it regular form with Justified so you can predict a switch from a Dark attack and get a free stage of attack which is a huge boost to Mega Lucario's already immense attack stat. Try this set instead:

http://media.pldh.net/pokemon/gen5/blackwhite_animated_front/448.gif (Unsupported image host)
Lucario @ Lucarionite
Ability: Justified
EVs: 252 Atk / 4 Def / 252 Spd
Jolly/Adamant Nature
- Bullet Punch
- Close Combat
- Swords Dance
- Crunch/ExtremeSpeed

Lucario doesn't need Earthquake, it's very redundant coverage besides Fighting STAB and Lucario already suffers from terrible four-moveslot syndrome as it is, so it's best to leave Earthquake off him and put it on someone else such as Landorus or Excadrill who can better put it to use. Bullet Punch functions as an 80 BP (after Adaptability) Steel-type priority STAB which helps with faster Rock-types such as Choice Scarf Terrakion where Close Combat won't do the job. Close Combat is the main move of the set; if it doesn't resist it, use Close Combat. It's 240 BP after Adaptability, and backed by a huge 145 Attack stat, this thing devastates anything switching into it. Swords Dance is used to supplement his Attack even more, making him an almost uncounterable mile-high 854 Attack, which guarantees Close Combat to OHKO almost everything in the game that doesn't resist it.

Look at these damage calculations:

Adaptability Mega-Lucario (252+ Atk) vs. Skarmory (252/252+): 105.4% - 124.6% / Guaranteed OHKO

One Swords Dance is all you need. The final moveslot is based on what your team fears or what Lucario needs to get past: Crunch allows for safe coverage against Psychic and Ghost types, most notably the Lati@s duo and Aegislash, while ExtremeSpeed allows you to get past Talonflame and other fast priority users that resist Bullet Punch such as Breloom and Conkeldurr at +2, which would rather OHKO you otherwise.

I didn't look at the rest of the team closely, but if you have any questions, let me know.  

Ok, thanks. I used the other set in just single player mode(where I used sp attack) but find this one is better. Also, landorous isn't banned in OU?  

No, neither of his forms are banned. That reminds me, you may want to swap Crunch/ESpeed for Ice Punch if you have trouble with Landorus and Gliscor.  

Ah, ok, I'll swap it for Espeed considering the amount of popular pokemon weak to it.  

thundorus and landorus too OP

edit: Crits are ****ing everywhere in showdown  

Ok I have a dilemma. I'm setting up a mega banette(mainly just for fun) and I'm wondering of using hex(because of prankster+will-o-wisp) or shadow claw(for mega banette's high attack). Thoughts?  

Depends what your team is walled by.  

Well, both moves are ghost type but I was really just wondering which would do more damage.  

Well, Hex is special and Shadow Claw is physical. So if you're running a physical set, then Shadow Claw.