Hai there! I'll rate your UU team fully :P
Anyway, nice looking team you've got there; though it can be improved. It overall has nice synergy, but some things are off.
Don't try setting up both Spikes and Toxic Spikes with Roserade. It's typing and low defense lowers its survivability, and it needs 5 turns to set up all the hazards. If you're using Roserade offensively like that, I suggest you go for the Toxic Spikes Roserade:
Roserade (F) @ Focus Sash / Black Sludge
Trait: Natural Cure
EVs: 4 HP / 252 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Sleep Powder
- Toxic Spikes
- Leaf Storm / Giga Drain
- Sludge Bomb
Here it is, pretty simple. EVs give offensive power to get hard hits with Leaf Storm and Sludge Bomb, as well as Speed to screw the opponent with Sleep Powder. Natural Cure is a great way to absorb status at your fellow teammates, and its Poison typing easily absorbs Toxic Spikes and Poisoning aimed at Dusclops, your boss wall. Anyway, back to the moves. Anyway, to the moves. Sleep Powder puts the opposing Pokemon to sleep, and helps you set up on them. Toxic Spikes is the hazards you set, and helps lower your opponent's HP to aid in sweeping. I have two options for the next slot. Leaf Storm is a ridiculous 210 base power (STAB included) that picks off Pokemon, but it lowers your Special Attack. It's best used with Focus Sash. Giga Drain is a safer STAB alternative, and heals you for extra longevity. That is best utilized with Black Sludge. Sludge Bomb is STAB, nothing much to say about it.
Finally, I haven't seen use of this guy for awhile. Replace Extrasensory for Focus Blast and Night Daze to Dark Pulse. Near perfect coverage is provided with the two moves, only missing out on Heracross, which is solved by Flamethrower.
Use an Adamant Nature (+Atk, -SAtk) over Hasty. Kingdra might need those defenses, and there's absolutely no reason for them to be lowered if there's a Special Attack stat that isn't needed! You're also missing 4 EVs. Toss them Special Defense to stop Downloaders like Porygon2 and Porygon-Z from getting their Special Attack boost. Finally, replace Body Slam with Substitute for some SubBoosting.
Use Jolly Nature (+Spd, -SAtk) instead of Hasty. Arcanine has no reason to have its Defense lowered if there's a Special Attack stat unneeded, right? xD Throw the 4 EVs into Special Defense to stop Downloaders like Porygon2 and Porygon-Z from getting their Special Attack boost. You can also try 72 HP / 252 Atk / 8 SDef / 176 Spd with Adamant, but it's not necessary.
Use a Relaxed Nature to make your Bronzong into a better Physical Wall. Also, use Stealth Rock over Future Sight to help lower HP to nail crucial KOs.
Seeing as you have a Physical wall already, I'm going to make this one Specially Defensive. Basically, change Toxic to Will-O-Wisp to help the Pokemon like Roserade that have low defense. And switch the EVs to 252 HP / 80 Def / 176 SDef with Calm (+SDef, -Atk).