Celebi@Leftovers
Bold
252 HP / 220 Def / 36 Spe
~ Leech Seed
~ Calm Mind
~ Recover / Substitute
~ Psychic / Grass Knot
One of the best Calm minder.
Blissey@Leftovers
Calm
Natural Cure
252 Def / 80 SpA / 176 SpD
~ Wish
~ Protect / Softboiled
~ Flamethrower / Ice Beam
~ Toxic
The Wish / Protect combination is all the more appealing on Blissey in DP thanks in large to the popularity of Choice item users. The silver lining to this set resides in the fantastic safety net Protect casts over Blissey. At any point over around 50% HP, WishBliss will not be threatened by Choice-boosted Pursuit from Pokémon like Tyranitar, Weavile and Heracross simply because of Protect. She can Protect heads-up to see if they used Pursuit, intending to deal a heavy blow to a switching Blissey.
Garchomp@Choice Scarf
Adamant
252 Atk / 4 SpD / 252 Spe
~ Outrage
~ Earthquake
~ Crunch / Stone Edge
~ Fire Blast
Choice Scarf Garchomp makes a really awesome revenge killer and Choice Scarf user in general. It's still very dangerous with that sky-high Attack stat and a high base-power main attack. Outrage is your main attack here, and you don't have to worry as much about being locked in because you immediately outspeed everything without a Choice Scarf. As said above, this Garchomp gets good use out of being a revenge killer—if you send it in on something partially weakened, your opponent has to choose between losing what they have out, or sending something else in to take two Outrage hits. This set's main problem is that its main moves get walled by things like Skarmory, reducing its revenge-kill effectiveness.
Gengar@Focus Sash
Hasty / Timid
4 HP / 252 SpA / 252 Spe
~ Counter
~ Hypnosis
~ Explosion / Destiny Bond
~ Shadow Ball
This moveset can potentially cripple one half of your opponent's team if it is used correctly. You start by Countering an obvious OHKO move from a Pokémon like Weavile. That's one Pokémon down already. If you are feeling lucky, you can attempt to put another Pokémon to sleep with Hypnosis. However, if Sand Stream is in effect, you would be better off having already put something to sleep. Once you counter the Pokémon you will already be dead as well. And the last mission is to Explode on or Destiny Bond the third Pokémon. It is pretty simple, but Sand Stream really ruins it.
Feraligatr@Leftovers / Life Orb
Adamant
28 HP / 252 Atk / 228 Spe
~ Dragon Dance
~ Waterfall
~ Ice Punch
~ Earthquake
Feraligatr got quite a few new toys to play with in DP, and this set demonstrates three of them: Dragon Dance, physical STAB, and physical Ice Punch. Feraligatr can take a hit reasonably well, so Leftovers makes use of that. If you want to increase Feraligatr's attack power, go with Life Orb. Eventually the recoil will activate Torrent, making Waterfall even more powerful, at least for a couple of turns.
Infernape@Life Orb
Naive
24 Atk / 252 SpA / 232 Spe
~ Flamethrower / Fire Blast
~ Close Combat
~ Nasty Plot
~ Grass Knot / Hidden Power Ice
To say this is good at taking out walls is an understatement. Close Combat absolutely ruins anyone silly enough to switch in something weak to it. After a single Nasty Plot, Grass Knot will OHKO Suicune, Slowbro, and Milotic unless they're running Special Defense. It also has a chance to OHKO Gyarados if it doesn't invest in HP, and does about 65% damage to Vaporeon. Swampert, Donphan and Hippowdon don't even stand a chance. You can then sweep with Flamethrower and Close Combat. Flamethrower is suggested over Fire Blast because it's your main sweeping move and you really do not want to get killed after setting up because Fire Blast misses (Infernape WILL die if it gets hit), but Fire Blast has a shot at OHKOing Cresselia with no Special Defense EVs when they switch in on Stealth Rock, provided Sandstorm is in play. Any form of prior damage means it loses, with or without Sandstorm. Hidden Power Ice is an option over Grass Knot, as it will OHKO Salamence, who otherwise resists every attack that you carry.