Please rate my: OU team

Question

Watercolor (Scizor) (F) @ Leftovers
Trait: Technician
EVs: 252 HP / 56 Atk / 200 SDef
Adamant Nature (^Atk - Sp Atk)
- Bullet Punch
- Swords Dance
- Bug Bite
- Roost

Sweet Kiss (Haxorus) (F) @ Choice Band
Trait: Mold Breaker
EVs: 252 Atk / 4 Def / 252 Spd
Adamant Nature (^Atk -Sp Atk)
- Earthquake
- Outrage
- Superpower
- Aqua Tail

Pinch pinch (Gliscor) (F) @ Toxic Orb
Trait: Poison Heal
EVs: 252 HP / 200 Def / 56 Spd
Careful Nature (^Sp Def -Sp Atk)
- Earthquake
- Swords Dance
- Substitute
- Protect

Lala (Latias) (F) @ Leftovers
Trait: Levitate
EVs: 252 HP / 200 Def / 56 SAtk
Bold Nature (^Def -Atk)
- Calm Mind
- Recover
- Dragon Pulse
- Hidden Power [Fire]

BEBEBEBEBEBEBEBEBEBEBEBE (Heatran) (F) @ Leftovers
Trait: Flash Fire
Shiny: Yes
EVs: 252 HP / 4 SAtk / 252 SDef
Calm Nature (^Sp Def -Atk)
- Roar
- Lava Plume
- Stealth Rock
- Earth Power

Gyary Pamyu Pamyu (Gyarados) (F) @ Life Orb
Trait: Intimidate
EVs: 252 Atk / 4 SDef / 252 Spd
Jolly Nature (^Speed -Sp Atk)
- Dragon Dance*
- Waterfall
- Earthquake
- Thunder Wave

• Not sure if I should keep Dragon Dance; not bulky enough to set it up.

This team has been working pretty okay for me on Showdown! for the most part, but sometimes I encounter problems when I know an Ice type is coming, or when I hate Sableye so much comes in; I'll take any ideas or suggestions into consideration. Also what are the major threats that will be trouble to this team? I am completely obvlious or don't have a lot of experience to the metagame ever since 5th Generation came in.
I usually lead off with Heatran for Roar/Rocks, or Gyarados for Intimidate and T-Wave when necessary. I'm also thinking of replacing Gliscor (as much fun as I'm having with him) Gliscor adds to my team's weakness of Ice attacks. All suggestions are welcome.

Comments

For Gyarados go with Moxie/Water Gem/Waterfall, to get the ball rolling. Also instead of dragon dance do ice fang or dragons with levitate will stall you. And instead of Swords Dance on Gliscor try Toxic.

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Ice Fang sounds like a nice replacement, and I usually like to set up on Pokemon that will stall me, which is why so many on my team has moves to set up.
I don't believe in using Moxie (it's so cheap), so I'll stick with the Intimidate.
I like Swords Dance on Gliscor, but I will try Toxic too, Earthquake doesn't cut it sometimes.
Thanks for your suggestions!

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For scizor, replace with bug bite or roost with baton pass. For gliscore, replace protect with u-turn. For gyarados, get one with moxie, Jolly nature, 252 spd, 252 sdef. Holding the salac berry (or whatever berry that raises speed when hp is below 25%) with waterfall, earthquake, ice fang, and dragon tail. Or if you still want to roll with intimidate, you can do dragon dance, waterfall, earthquake, and ice fang and make it hold a focus sash.

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epic, DPP sprites

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Cincino777, you're wrong about gliscor: I would use protect, then use u-turn to switch with a sweeper. It's the perfect tactic to K.O an opponent who's let their guard down. And sam, for Latias, replace hidden power for mist ball, and for heatran, try this moveset:

Fire blast
Magma storm
Iron head
Earthquake/earth power
Hope this helps! :D