These sets are meant for PBR. There are certain parts to each set that typically catch opponents off-guard and should prove very effective. In PBR, you can see the other player's Pokemon pre-battle, hence the surprise factor.
***Lopunny has been changed to Kecleon***
Clefable
@Zoom Lens
Ability: Magic Guard
Nature: Modest
EVs: 252 HP/6 DEF/252 SP ATT
>Fire Blast
>Thunder
>Blizzard
>Softboiled
+++Special Sweeper. With Zoom Lens, accuracy is boosted by 20% when Clefable moves last. She has access to quite a few powerful special moves and the Zoom Lens ensures better accuracy. Softboiled to heal.
Hitmonchan
@Focus Sash
Ability: Iron Fist
Nature: Adamant
EVs: 6 HP/252 ATT/252 SPEED
>Agility
>Drain Punch
>Ice Punch
>Thunder Punch
+++Boost speed w/ Agility the first turn, then gain health back with Drain Punch STAB, boosted with Iron Fist. Ice Punch/Thunder Punch for boltbeam combo.
Only things to watch out for here are first-strike moves and weather effects.
Azumarill
@Iron Ball
Ability: Huge Power
Nature: Adamant
EVs: 252 HP/252 ATT/6 SP DEF
>Substitute
>Focus Punch
>Aqua Jet
>Fling
+++Nice Phys Sweeper that can take a hit before setting up Sub, then Focus Punch away, Aqua Jet to strike first, or Fling for a nice surprise. Iron ball ensures ability to move second to set up sub.
Steelix
@Cutsap Berry
Ability: Sturdy
Nature: Impish
EVs: 200 HP/58 ATT/252 DEF
>Stealth Rock
>Roar
>Endure
>Explosion
+++Stealth Rock, then Roar to force switches. Finally, when a water/fire sweeper comes in, Endure the hit to activate the Cutsap Berry and Explode for a big finish.
Kecleon
@Lagging Tail
Ability: Color Change
Nature: Adamant
EVs: 200 HP/252 ATT/58 SP DEF
>Trick
>Skill Swap
>Shadow Claw
>Sucker Punch
+++Kecleon can take a few hits, so use Trick to ensure he moves first, or forces a switch. Then, Skill Swap when your opponent is expecting to get a "super effective" hit to shake things up. Follow up with super effective Shadow Claws and when things get rough, Sucker Punch away.
Dusknoir
@Leftovers
Ability: Pressure
Nature: Careful
EVs: 252 HP/ 58 DEF/ 200 SP DEF
>Will-o-wisp
>Pain Split
>Shadow Sneak
>Focus Punch
+++Standard 1st two options, then Shadow Sneak for a 1st turn surprise, or Focus Punch w/ anticipation of stat-boosters or switches.
Any comments/suggestions welcome.
***Lopunny has been changed to Kecleon***

Clefable
@Zoom Lens
Ability: Magic Guard
Nature: Modest
EVs: 252 HP/6 DEF/252 SP ATT
>Fire Blast
>Thunder
>Blizzard
>Softboiled
+++Special Sweeper. With Zoom Lens, accuracy is boosted by 20% when Clefable moves last. She has access to quite a few powerful special moves and the Zoom Lens ensures better accuracy. Softboiled to heal.

Hitmonchan
@Focus Sash
Ability: Iron Fist
Nature: Adamant
EVs: 6 HP/252 ATT/252 SPEED
>Agility
>Drain Punch
>Ice Punch
>Thunder Punch
+++Boost speed w/ Agility the first turn, then gain health back with Drain Punch STAB, boosted with Iron Fist. Ice Punch/Thunder Punch for boltbeam combo.
Only things to watch out for here are first-strike moves and weather effects.

Azumarill
@Iron Ball
Ability: Huge Power
Nature: Adamant
EVs: 252 HP/252 ATT/6 SP DEF
>Substitute
>Focus Punch
>Aqua Jet
>Fling
+++Nice Phys Sweeper that can take a hit before setting up Sub, then Focus Punch away, Aqua Jet to strike first, or Fling for a nice surprise. Iron ball ensures ability to move second to set up sub.

Steelix
@Cutsap Berry
Ability: Sturdy
Nature: Impish
EVs: 200 HP/58 ATT/252 DEF
>Stealth Rock
>Roar
>Endure
>Explosion
+++Stealth Rock, then Roar to force switches. Finally, when a water/fire sweeper comes in, Endure the hit to activate the Cutsap Berry and Explode for a big finish.

Kecleon
@Lagging Tail
Ability: Color Change
Nature: Adamant
EVs: 200 HP/252 ATT/58 SP DEF
>Trick
>Skill Swap
>Shadow Claw
>Sucker Punch
+++Kecleon can take a few hits, so use Trick to ensure he moves first, or forces a switch. Then, Skill Swap when your opponent is expecting to get a "super effective" hit to shake things up. Follow up with super effective Shadow Claws and when things get rough, Sucker Punch away.

Dusknoir
@Leftovers
Ability: Pressure
Nature: Careful
EVs: 252 HP/ 58 DEF/ 200 SP DEF
>Will-o-wisp
>Pain Split
>Shadow Sneak
>Focus Punch
+++Standard 1st two options, then Shadow Sneak for a 1st turn surprise, or Focus Punch w/ anticipation of stat-boosters or switches.
Any comments/suggestions welcome.