Red = Major Threat
Yellow= Threat
Green = Moderate Threat
Donphan – It’s not that difficult to deal with as a threat, but it is capable of spinning away hazards. Mismagius can switch in to block Rapid Spin, and can also burn it to cripple it. If hazards aren’t an issue, Milotic, and sometimes Zapdos can deal with it.
Hitmontop - It’s not that difficult to deal with as a threat, but it is capable of spinning away hazards. Mismagius can yet again help with Will-O-Wisp, as can Milotic and Zapdos. Nidoqueen can also be of some use.

Zapdos – There isn’t much it can do to stop Chansey. Nidoqueen also does a pretty good job at dealing with variants which lack HP Ice, and even then can force it out at least once. Registeel also does a nice job, provided it lacks Heat Wave.
Heracross – Heracross is always difficult to switch into for any team. Nidoqueen usually does a nice job switching in to virtually all of its common moves. Zapdos and Mismagius can come in on STAB moves, but fear Stone Edge. Registeel can take Stone Edge or Megahorn, but fears Close Combat. Most Heracross are choiced, so a little prediction can help deal with it.
Arcanine – Milotic normally does a great job switching in, but offensive sets with Wild Charge can 2HKO should they predict correctly, and have either prior damage on Milotic, or a bit of hazard support. If I can get by without switching into Wild Charge, I’ll be fine. Bulky variants are also dealt with even easier by Milotic. Nidoqueen can also make a decent check to both, but won’t enjoy taking Flare Blitz from offensive sets, but in return can switch into Wild Charge for free. Offensive sets aren’t a problem with proper prediction though.
Chansey – Unlike most walls, Toxic isn’t wearing it down. I have nothing capable of easily destroying it with offense. My best bets against it are to either have Toxic Spikes up ahead of time or by phazing it out after setting them up, or to have Mismagius come in on a non-status move and Taunt it, preventing it from doing anything, then gradually stalling it with burn damage. I also get a free recovery from Pain Split should it stay in.

Milotic – Toxic usually destroys it if it lacks Aromatherapy / Heal Bell support. RestTalk variants really aren’t that great, and can be dealt with easily enough. Zapdos can come in easily and use Thunderbolt if needed.

Nidoking – Chansey stops it easily enough. It has a hard time switching in as well. Zapdos can safely hit it with Hidden Power Ice when behind a Sub. It doesn’t like Scald or Earth Power from Milotic or Nidoqueen. Even Registeel and Mismagius do decent damage while it switches in.
Celebi – If Toxic Spikes are up, Natural Cure won’t help it. Mismagius can hit it with Shadow Ball. Chansey does a nice job against most of them since Celebi lacks Psyshock, and I can stall it out with Toxic. It should be going OU any day now though.
Roserade – Probably one of the most annoying things in UU. It’s very difficult to take down since I don’t have anything like Arcanine or Victini to OHKO it. It also doesn’t help that between Giga Drain, Leftovers, Leech Seed, and Rest + Natural Cure, it just never dies. I might be able to wear it down sometimes with Ice Beam or HP Ice, and it can be stalled out if it is the last pokemon, but often it will be difficult to deal with. Registeel does a nice job against it, but Spikes will wear my team down, and this is really the main reason I would like a spinner, if not something to just destroy Roserade.
Mew – Mew is unpredictable, and has two sets which are both annoying to deal with. As a Nasty Plotter, it is weaker than Azelf, but has greater bulk and recovery which makes it more difficult to wear down. It can also use Taunt + Will-O-Wisp to prevent my team from doing much. Mismagius can usually do nicely against the Taunt sets, and Chansey can play against the NP sets in a similar way as Azelf by poisoning it and attempting to wear it down, but it is much more difficult. Sometimes Mew isn’t that much of a threat though.
Victini – Much like Heracross, it’s just not very fun to switch into. V-Create hits incredibly hard, so anything but Milotic will be destroyed, bar Nidoqueen who can just barely survive and hit back with Earth Power if needed. Milotic does a nice job keeping it in check most of the time, but if I come in on Fusion Bolt, I might run into problems. Playing around it between Milotic and Nidoqueen is possible, plus Stealth Rock and Toxic Spikes can limit its time, but it’s still something to watch out for, primarily CB sets.
Mismagius – Registeel does a nice job against CM or Nasty Plot variants, as it can use Iron Head to quickly take it out. If I hit it with a Toxic on a turn I predict to not Sub, Chansey will stall it out by spamming Softboiled. My own Mismagius might also be able to take it on with Shadow Ball.
Rhyperior – It can destroy Zapdos using Rock Blast, which not even Substitute can save it from. Its high attack, and great STABs make it a challenge to switch into, but most of the time Milotic can handle it. If Milotic has taken too much prior damage though, I’ll have my work cut out for me unless I can manage to burn it with Mismagius.

Empoleon – Zapdos takes it on with Thunderbolt. It lacks recovery outside of Wish support or Rest, so wearing it down is always an option. Mismagius can Taunt it to prevent it from phazing, which is like the only thing it can really do to my team overall.

Flygon – It’s really not that hard to predict around. It is usually reluctant to use its Dragon STAB (often Outrage) but when it does Registeel stops it. Zapdos can take anything but Stone Edge, and act accordingly. Mismagius might be able to burn it. The main annoyance is that it can U-turn everywhere.
Azelf – Azelf is never fun to deal with if it gets a Nasty Plot. Fortunately several I have encountered have been Stealth Rock variants, which pose little problem for Chansey. Nasty Plot variants often need to be poisoned, then stalled by carefully switching between Registeel and Chansey to take Psyshock and Flamethrower.

Slowbro – Similar to Milotic, only it can’t use Dragon Tail to phaze me around. Toxic or Thunderbolt will usually stop it. It is also vulnerable to Mismagius, who can either Taunt to prevent status / recovery, or hit it with Shadow Ball.

Mamoswine – Milotic can take an Earthquake and Recover off damage. All its other moves are even weaker. Mismagius can burn it if it tries to switch in. If burned, Registeel can hit it with Iron Head if I have no other options.
Raikou – SubCM can’t be stopped easily by Chansey since it can set up on it due to 101 Subs. Registeel can’t do much do it either since I don’t carry Earthquake. Nidoqueen can be helpful against it, especially if I can set up Toxic Spikes in advance. Mismagius might also need to help with Taunt.

Registeel – Doesn’t enjoy a burn from Mismagius or Milotic. Occasional Curse variants are stopped by Milotic. Overall, it isn’t hard to wear it down over the course of the battle, but with Rest it can be somewhat more annoying to stop, but it still rarely does much against my team. Nidoqueen can hit it with Earth Power, and use Dragon Tail to phaze it out before it wakes up should it carry Rest.
Rotom-H – Often carries Trick, making me paranoid about just throwing Chansey at it, but if I can get it to Trick something else, it will be no problem. If it is choiced, and has not Tricked yet, either Milotic or Nidoqueen can take its STAB moves easily, but a misprediction could hurt. Without a choice item, there is little it can do against Chansey.

Cobalion – Nidoqueen does a nice job at taking Close Combat and Stone Edge. It can usually take Iron Head, unless it flinches while hitting back with Earth Power. Milotic can Haze or attempt to hit it with Scald. If for any reason it lacks Stone Edge, Zapdos beats it. I might also beat it even with Stone Edge should I have a Sub up thanks to Pressure stall.

Kingdra – Milotic Hazes away its boosts. Registeel can stop it should it lock itself into Outrage. Toxic or Toxic Spikes can prevent most of them from being a threat. Will-O-Wisp or Scald getting a burn prevents physical sets from getting far. Chansey walls special variants forever.
Froslass – Annoying because of Spikes, but even more annoying if Hail is up. Mismagius can Taunt it if it doesn’t get Taunted first. Registeel can spam Iron Head until it goes down, but it will most likely get up its Spikes. Destiny Bond can also be annoying to deal with.

Suicune – Milotic prevents it from Calm Minding, which is often the main niche Suicune has over its fellow bulky waters. Zapdos can hit it with Thunderbolt. Registeel or Chansey can beat non-Rest or Sub variants with Toxic.
Deoxys-D – Spikes can annoy my team, but its often easily taken care of after a Toxic. Mismagius can also prevent it from setting up or recovering, while also beating it down with Shadow Ball. Keeping it from setting up over time is the main obstacle.

Jolteon – Chansey walls it forever. Nidoqueen can prevent it from spamming its STAB, or Volt Switching around. Registeel can take hits from it fairly easily.

Nidoqueen – My own Nidoqueen removes any Toxic Spikes it sets up. Chansey can take its attacking moves without a problem, and won’t mind being set up on if my Nido can remove Toxic Spikes later. If it lacks Ice Beam, Zapdos does a nice job handling it. Milotic can also deal with it easily. Mismagius fears little, and Taunts it.
Crobat – Its speedy Taunt makes it very difficult to deal with at times, especially considering it can Roost back HP, and U-turn around. Nidoqueen and Milotic can threaten it with Ice Beam. Zapdos can use Thunderbolt, but since all are outsped and hit by U-turn, there really isn’t much I can do except predict switch ins until it runs out of things to hide behind.

Snorlax – Mismagius often burns it and prevents it from being much of an offensive threat, which is really its big selling point over Chansey. Taunt can also prevent it from Resting or doing much of anything really. Registeel can also do a good job against it should it not carry Earthquake or Fire Punch. Milotic trolls the Curse variants.
Abomasnow – SubSeeders are annoying enough for my team as is, but adding Hail on top of that makes it much worse. If I can hit it with Toxic it usually won’t be a threat by itself. Mismagius can Taunt to prevent SubSeeding if needed.

Bisharp – Amusingly, Mismagius does a great job checking it as it often carries Sucker Punch as its only STAB. Will-O-Wisp wrecks it. Haze Milotic prevents it from getting very far as well. Zapdos is usually relatively safe behind a Sub.

Escavalier – If Mismagius or Milotic burn it, it is much easier to deal with. Registeel and Zapdos resist its STABs, and usually do a nice job dealing with it. Nidoqueen can also take a Megahorn if needed.

Togekiss – Chansey can remove any paralysis it might try to spread. It doesn’t enjoy Toxic very much either. Zapdos can nail it with Thunderbolt. Registeel is also bulky enough to take an Aura Sphere if needed to put Toxic on it. Mismagius might also help by Taunting it to prevent it from spamming Thunder Wave or Roost.
Weavile – Much like Houndoom, it usually isn’t hard to stop with Milotic, but the fact that it can cost me Mismagius or pressure me into letting my opponent spin for free makes it a bit more intimidating. It’s not quite as bad though since it can’t switch into a Will-O-Wisp.

Dusclops – I don’t carry a spinner, so I don’t really have issues with it. Toxic destroys it. Taunt from Mismagius usually stops it. It is often set up fodder for Nidoqueen. Rest or Aromatherapy support can increase its life span, but it usually won’t be doing much in return to my team.

Venomoth – Milotic can Haze away boosts, but Sleep Powder can be annoying. I usually have to fodder something to sleep, then go Haze it with Milotic, but that normally isn’t a problem considering I have Aromatherapy. Recipients are going to be special attackers, so Chansey might be able to stop if it does manage to pass for some reason.

Ambipom – Mismagius usually stops it with Will-O-Wisp, and being immune to its STAB helps. Very few seem to run Pursuit for whatever reason. Registeel, Milotic, and Nidoqueen can usually take most of what it tries to dish out.
Blastoise – Similar to Donphan and Hitmontop, easy to deal with, but losing hazards is no fun. Zapdos can usually switch in and scare it out. Mismagius can spin block. Registeel and Chansey hit it with Toxic.

Gorebyss – Milotic Hazes away its boosts, often inducing rage quits considering teams with it are often built around a pass. It can’t even attempt to set up against Zapdos or Mismagius, and Thunderbolt or Taunt can ruin its strategy. If someone tried to sweep with it, Chansey would stop it.
Houndoom – Usually Milotic or Chansey make great answers to it, but it can cost my Mismagius earlier than I would like. It really doesn’t threaten me that much, but it prevents me from using a valuable team member out of fear that I could lose it, which can be devastating when I need to spin block at times.
Shaymin – SubSeed sets can be annoying to stop if given an opportunity to set up, but offensive sets are usually stopped cold by Chansey bar a timely special defense drop. Zapdos can waste Seed Flare PP quickly. Registeel can tank a hit without fearing the drop. Mismagius might have to help out by Taunting a SubSeed set should it need to.

Zoroark – Illusion can be annoying on occasion, but most people who use it don’t do a great job using its surprise factor. Chansey pretty much walls it easily. It has very few opportunities to come in, bar after a KO or against Mismagius.
Sceptile – Swords Dance variants can be somewhat annoying to stop since Milotic has no business Hazing, but it can be brought down. If Mismagius can manage a Burn, it won’t be a threat. Toxic from Chansey or Registeel also makes it possible to stall out. Most things on my team have something to hit back reasonably hard if they are forced to take a hit from it.

Spiritomb – Doesn’t enjoy Toxic from Registeel or Chansey, and Toxic Spikes make it even easier. Rest can prolong its defeat, but it really doesn’t threaten my team much. CM variants are stopped by Milotic. It has little it can do to damage anything, bar maybe Pursuiting Mismagius, but that is hardly an issue with Will-O-Wisp.

Azumarill – Milotic usually stops it, and makes it useless if I manage a burn. If Mismagius is out, it can survive any of its attacks once it gets hit with Will-O-Wisp. Zapdos KOs with Thunderbolt.

Durant – Registeel resists its common moves and deals great damage with Seismic Toss. Milotic can Haze Durant’s boosts away if needed, or just threaten to burn it with Scald, as well as dealing a good chunk of damage.

Hippopotas – Really not much of a threat on its own, but Sand does negate Leftovers on all but Registeel and Nidoqueen, and Chansey definitely doesn’t enjoy the residual damage. It can sometimes be paired with Stoutland, which can usually be dealt with by Mismagius or Registeel. Mismagius can prevent Hippopotas from doing anything such as Stealth Rock or Roar, so it will be dead weight usually.

Sigilyph – Can be tricky to stop at times, but Mismagius can usually put a full stop to it. Zapdos also does a nice job at dealing with it if it doesn’t have enough boosts. Worst case scenario, I use the combination of Milotic and Chansey to PP stall it by gradually Hazing away its boosts and damaging it over time to deplete its Roosts so it can be safely taken care of.
Umbreon – It can be tricky to take down as I lack a strong Fighting type to demolish it. The main thing it does to my team is counter Mismagius and remove status using Heal Bell, or providing Wish support to its team. Generally I can just use status moves to defeat it due to Heal Bell having a low amount of PP, but facing one of these will almost always guarantee a drawn out battle.