Armaldo
Type: Rock / Bug
Base Stats: 75 HP / 125 Atk / 100 Def / 70 SpA / 80 SpD / 45 Spe
Abilities:Battle Armor / Swift Swim
Armaldo has cemented itself as the premiere spinner in NU - sporting Base 125 Attack and excellent coverage to go a long with Rapid Spin. Armaldo is capable of getting past every Ghost-type in the tier with a Swords Dance set, allowing him to get a spin at a different point in the match. Aqua Tail is the coverage move of choice, working alongside Stone Edge to give it the ability to hit all Ghost-types for neutral damage. Armaldo also has the potential to become a potent Wallbreaker with a Choice Band, running X-Scissor and Earthquake along with the aforementioned Aqua Tail and Stone Edge, ripping through nearly every physical wall in the tier. Armaldo also has access to Rock Polish, which doubles his Speed and can allot him to clean up late game, as a +2 Armaldo is quite fast, and quite bulky considering Armaldo's natural bulk. Armaldo's typing is both a blessing and a curse, since if gives him great STABs but leaves him susceptible to many attacks.
Articuno
Type: Ice / Flying
Base Stats: 90 HP / 85 Atk / 100 Def / 95 SpA / 125 SpD / 85 Spe
Abilities: Pressure / Snow Cloak (Unreleased)
Articuno has quickly risen to become one of the most threatening Pokemon in NU. Her powerful offensive STABs coming off of Base 95 Special Attack allow her to rip most offensive teams to shreds with her STABs alone. Ice Beam and Hurricane have amazing neutral coverage, with Hidden Power Ground rounding it out to hit the few Steel-types in the tier. Articuno is also able to abuse Roost very well, using her ability Pressure to force her opponents out of PP very quickly. A SubRoost set is very potent, since Articuno is most threatening when behind a substitute, where she can abuse her amazing natural bulk, speed and offense. Articuno's stats really give her a lot to work with, with only her typing letting her down. a 4X Stealth Rock weakness is hard to come back from, yet Articuno is able to function quite well even without a spinner. A lesser seen Articuno set is a Choice Specs set, where Articuno launches high-powered Ice Beams at the opposition, and can safely U-Turn early game to gain momentum.
Beheeyem
Type: Psychic
Base Stats: 75 HP / 75 Atk / 75 Def / 125 SpA / 95 SpD / 45 Spe
Abilities: Telepathy / Synchronize / Analytic
Dream World has finally released what Beheeyem has long been waiting for, Analytic. Analyic turns Beheeyem into an offensive behemoth instead of a subpar Psychic-type that he used to be. With Analytic Beheeyem has many sets that he can abuse: a 4 attack Choice Specs set is the most immediately dangerous, running Thunderbolt, Signal Beam and Hidden Power Ground alongside Psychic to deal massive damage to every Pokemon in the metagame besides Shedinja. Specs Beheeyem even has a chance to OHKO Physically Defensie Regirock on the switch! With Analytic Beheeyem can also abuse a 3 attac + Recover set, dropping a move from the Specs set to increase it's survivability. Outside of Analytic Beheeyem is still the slowest Pokemon in NU with access to both Trick Room and Nasty Plot, making him a great Trick Room sweeper, allowing him to decimate any team without priority. A standard Nasty Plot or Calm Mind set is also viable, but not a recommended as Beheeyem has much better things to do.
Butterfree
Type: Bug / Flying
Base Stats: 60 HP / 45 Atk / 50 Def / 80 SpA / 80 SpD / 70 Spe
Abilities: Compoundeyes / Tinted Lens
Poor stats aside, Butterfree has carved a niche for herself in the NU metagame. Quiver Dance is an incredible move, and when combined with Sleep Powder and Butterfree's two amazing abilities she is the best user of it in NU. Tinted Lens is the preferred ability, sacrificing a near 100% accurate Sleep Powder for a much more powerful Bug Buzz, as many Pokemon resist it. With Tinted Lens the number of Butterfree counters drop greatly. Butterfree can also run a support set with Compoundeyes, abusing Stun Spore, Sleep Powder and U-Turn to cripple the opposing team before dying. Butterfree also has access to Tailwind, just increasing her ability to support the team.
Camerupt
Type: Fire / Ground
Base Stats: 70 HP / 100 Atk / 70 Def / 105 SpA / 75 SpD / 40 Spe
Abilities: Magma Armor / Solid Rock / Anger Point
Camerupt is a Pokemon who's niche has changed drastically recently. Formerly a defensive Pokemon focused on walling powerful Pokemon such as Magmortar, Camerupt has begun to take on a more offensive route abusing his Base 105 Special Attack. Rock Polish Camerupt is able to use high-powered moves such as Fire Blast and Earth Power to rip through teams. Camerupt can also use a physical Rock Polish set, but it is not as good because of the lack of a Fire-type STAB move. Camerupt can still play defensively and tank hits from Fire-type attackers such as Combusken or Charizard, but this is not recommended because Camerupt has subpar defenses, and should be focusing on it's offenses instead. Camerupt can also abuse Eruption with a Choice Specs set, which has the potential to destroy just about every Pokemoni n the metagame, however Camerupt's low speed means it rarely gets to use Eruption more then once.
Charizard
Type: Fire / Flying
Base Stats: 78 HP / 84 Atk / 78 Def / 109 SpA / 85 SpD / 100 Spe
Abilities: Blaze / Solar Power
Once thought to be broken due to the sheer power of its Specs set, Charizard is a Pokemon that is comfortably NU. Charizard is best used abusing Solar Power under Sunny Day, where it can use an incredibly powerful Fire Blast and destroy most of the tier. Charizard can potentially run a myriad of sets: Choice Specs has sheer power and almost nothing can avoid the 2HKO. A Choice Scarf set isn't quite as powerful, but is nearly impossible to outspeed and can decimate offensive teams. Charizard can also use sets without a Choice Item, using a SubRoost set outside of sun to force switches and wear down the opposition. Charizard can also run a self-sufficient Sunny Day set abusing Fire Blast and Solarbeam, which are both very hard to switch into with Solar Power. Charizard also has the ability to run a physical set, with Dragon Dance, Swords Dance and Belly Drum at his disposal. However Charizard will struggle to find a time to get a boost and is generally better off using a Special Attack set.
Combusken
Type: Fire / Fighting
Base Stats: 60 HP / 85 Atk / 60 Def / 85 SpA / 60 SpD / 55 Spe
Abilities: Blaze / Speed Boost
Combusken is the most common user of Speed Boost in the NU metagame. Speed Boost turns Combusken into a solid offensive Pokemon instead of a forgettable NFE. The most common Combusken set is a Special Attacker, using his two most powerful STABs, Fire blast and Focus Blast, as well as Protect to guarantee a Speed Boost, and Substitute to take advantage of forced switches. The Special Attacking Combusken has problems with accuracy, but the sheer power of Life Orb boosted attacks make up for it. Combusken can also run a potent Swords Dance set, although it will struggle to find time to boost, so will often be much weaker than the special variant because its moves have lower base power. Speed Boost means that if Combusken can get going it becomes very difficult to stop without priority.
will write later. I'll also add sprites next to all my mons in a bit, I'll deal with formatting once I get more written up. Also taking Camerupt, Charizard and Combusken for me when i get back. I'm going through them alphabetically!
OK now im taking Cradily, Dragonair and Drifblim!