Things that Need to be Updated:
Changes to Offensive Threat List:
Trick. Every Pokemon that can learn Trick should be noted since Trick is one potentially damaging move and everyone needs to know that "This Pokemon can Trick you". I think it's important to add.
Rhyperior needs to be added again, considering the Rock Polish sets seem to be all the rage nowadays, considering Bulky Water isn't as prominent anymore.
Jirachi: Psychic/Steel. 100 Base in every stat, boasts Calm Mind, Psychic, Grass Knot, Thunderbolt, Wish, U-Turn, Reflect, Thunder Wave and greatly benefits from "Serene Grace".
Jirachi gained Iron Head, which has a 60% flinch rate with Serene Grace and it's a much better offensive typing than Zen Headbutt. Physical Jirachis are also common meaning that we should also add the Elemental Punches
Salamence: Dragon/Flying. 135 Base Attack, 110 Base Special Attack, 100 Base Speed, "Intimidate", and the ability, with either Choice Band or Choice Specs, to hit EXTREMELY hard off the bat from both ends of the damage spectrum. Besides Dragon Dance, its large movepool includes: Draco Meteor, Dragon Claw, Earthquake, Rock Slide/Stone Edge, Brick Break, Flamethrower/Fire Blast, Hydro Pump, Dragon Pulse and Roost.
Outrage needs to be added.
Dragonite: Dragon/Flying. 134 Base Attack, 100 Base Special Attack, 80 Base Speed. Dragon Claw, Earthquake, Fire Punch, Focus Punch, Draco Meteor, Dragon Pulse, Thunderbolt, Flamethrower/Fire Blast and Ice Beam are among its impressive myriad attacking moves, and Dragonite also has Roost, Heal Bell, Thunder Wave and Safeguard as great support options.
Dragonite "Probably should be removed" mostly because I think if you can cover DD Mence You can cover Dragonite quite well.
Kingdra: Water/Dragon. 95 Base Attack, Defense, Special Attack and Special Defense, 85 Base Speed, 75 Base HP. Sports two fun abilities in "Swift Swim", which doubles its speed in the rain, and "Sniper", which grants its critical hits 3× power instead of 2×. Among the most effective moves for Kingdra are: Rain Dance, Surf, Waterfall, Dragon Pulse, Draco Meteor, Dragon Dance, and Yawn. It's worth noting that with Swift Swim, the single turn it takes to set up Rain Dance will not only double Kingdra's speed but boost both its physical and special Water-type moves one stage, which makes both Life Orb and Mystic Water look great on it.
Outrage should be added
Scizor: Bug/Steel. 130 Base Attack, 100 Base Defense, 65 Base Speed. Makes great use of its new "Technician" ability, which grants a 1.5× boost to all attacks 60 Base Power or less, and can still benefit from "Swarm" which grants the same boost to Bug-type Attack when at 33% or less HP. Scizor's decent movepool includes, X-Scissor, U-Turn, Iron Head, Brick Break, Pursuit, Aerial Ace, Quick Attack, Swords Dance, Agility, Baton Pass, and Roost. It very much welcomes the benefits of Life Orb, Choice Band and Choice Scarf.
Bullet Punch should be added.
Defensive Threat List:
Rotom A: I don't think there's any reason not to add this considering it's a much better Dusknoir. On that note, Dusknoir should likely be removed and replaced for Rotom A.
Poliwrath: I have never ever seen a Poliwrath used in competitive play... yet. I think Machamp can take its place.
Tangrowth - 100/125/50
Grass. A very reliable Earthquake resistance, with a highly diverse movepool that includes Leech Seed, Knock Off, Sleep Powder, Reflect and Stun Spore on the supportive side. Can use Sunny Day/SolarBeam effectively, or use another Grass attack like Energy Ball, Power Whip or Grass Knot, can be accompanied by Earthquake.
Lack of reliable recovery means that "if you can get past Celebi you can probably get past Tangrowth"
Steelix - 75/200/65
Steel/Ground. A typing that laughs at many, many opposing types, and with Defense like that it can shrug off Earthquakes if it has to from say, Metagross. It can set up Stealth Rock and phaze with Roar, but beyond that it usually doesn't hurt anything with some kind of defense. Earthquake and Gyro Ball are used to inflict damage against enemies weak to it.
Steelix is also something I don't really find the point of keeping, I think if you can get past Metagross and friends you should be able to deal with Steelix comfortably.