So lets start.
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Zoroark:
Firstly, remove that Detect on it. Zoroark is ment to be a trick special sweeper and does not need the Detect to help it do that. Give it Dark Pulse as a STAB and Flamethrower for coverage. Give it Extrasensory for Fighting type coverage and a nice little chance to flinch is always good. Then as the last slot, give it Nasty Plot as the opponent will be busy figuring out whether you are an illusion or not.
Zoroark @Wise Glasses
Trait: Illusion
Shiny: Yes
EVs: 252 SpA, 252 Spe, 4 HP
Jolly Nature
- Nasty Plot
- Flamethrower
- Dark Pulse
- Extrasensory
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Hydregion:
I know why you do not have an item on Hydregion, because of Acrobatics? Well, Hydre is a special attacker by skill and stats, and should be put to use correctly. Life Orb helps Hydregion a lot. The set as such I have no problem with, but replace Draco Meteor for Dragon Pulse and Acrobatics for Surf.
Hydreigon @Life Orb
Trait: Levitate
EVs: 252 SpA, 252 Spe, 4 HP
Mild Nature
- Dragon Pulse
- Dark Pulse
- Flamethrower
- Surf
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Drapion:
Drapions moveset is great, and I love it so I will make no changes to that. Take the Chople Berry off and give it the Muscle Band instead. The EV spread needs a bit more tweaking so I will post the full set below anyway. I haven't written much on this because the general plan of this set is very nice.
Drapion @ Muscle Band
Trait: Sniper
EVs: 252 Atk, 252 Spe, 4 SpD
Adamant Nature
- Night Slash
- Slash
- Swords Dance
- Earthquake
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Tyranitar:
Nice use of the Choice Scarf there, but making this hardcore physcial sweeper into a mixed is really going to affect its reliability against others. I say right now, make it into a physical sweeper as always. I am going to change the EV spread for this set and will tweak around a bit more as well.
Tyranitar @Choice Scarf
Trait: Unnerve
EVs: 252 Atk, 252 SpD, 4 Def
Naughty Nature
- Fire Punch
- Stone Edge
- Dragon Dance
- Crunch
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Shiftry
Now giving Shiftry PickPocket is a very risky move. A choice item unexpectedly given to you will screw this set through and through, so give it the Muscle Band, we are going the physical way for this case. Seed Bomb is going to be kept for sure, it is a great grass type STAB and 90 Base Power isn't too bad for Shiftry. I will put all the changes straight into the set below.
Shiftry @Muscle Band
Trait: Early Bird
EVs: 252 Atk, 252 Spe, 4 Def
Lonely Nature
- Seed Bomb
- Foul Play
- Low Sweep
- Swords Dance
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Mandibuzz
Very good use of the Weak Armour here, this set is clearly going to be a very successful set for all the battles. There is a small con of having Whirlwind on Mandibuzz, but the risk is definitely worth it for the prize. I am really getting tired now, I have written 3 RMT's today, so I will just write the last set and this.
Mandibuzz (F) @ Dark Gem
Trait: Weak Armor
EVs: 252 HP, 128 Def, 128 SpD
Lax Nature
- Whirlwind
- Punishment
- U-turn
- Roost
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Well, hope I helped!