Art by hexagonereal | Format (stolen) from National Dex Other Tiers Good Cores Thread which was (stolen) from SV National Dex Good Cores Thread which was (stolen) from SS OU Good Cores Thread
A strong core is one of the most valuable things to form when creating a new team. Cores are typically made up of a group of Pokémon that, when used together, work excellently toward accomplishing a specific goal, and any good player uses them, intentionally or not. The majority of cores have varying characteristics that allow them to triumph in different areas, and depending on your team, cores can be built to succeed offensively or defensively.
An offensive core is a group of Pokémon that are both focused towards and designed to enable the team to break through most other team styles while being balanced for general play.
A defensive core is a group of Pokémon chosen to give a team a solid set of resistances and the ability to switch into many of the common and threatening attacks in the metagame, allowing it to stick around long enough to win the match.
Overall, cores function as a fantastic base or starting point for a wide range of teams and they are commonly used while teambuilding to achieve a specific goal.


- Any person can post a core in this thread. The cores are broken down into four categories: offensive cores, balanced cores, defensive cores, and weather cores. When posting your core, please make sure to state which one of these categories your core falls under. Note: We've merged offensive and weather into one category, and balanced and defensive into another.
- Although the way your core works may be obvious to you, this may not be the case for others. As such, when posting a core, please make sure to explain how the core operates and any other details you think are important to include. The explanations don't have to be essays; as long as your post has some substance and conveys the main idea behind the core, it's all good. Here are some things you may like to include when explaining your core:
- Offensive Core: Should your core be an offensive one, such as Tapu Lele + Kartana, you could explain how those two Pokemon work together to break down their similar checks and any other synergistic traits. You could also mention any weaknesses the core has and any partners you believe work well with the core.
- Here is a good example of what we look for taken from the ORAS iteration.
- Defensive Core: Should your core be defensive, such as Hippowdon + Skarmory, you could explain their typing synergy allows them to cover problematic Pokemon for one another, or any other synergistic attributes you feel are relevant. You could also mention any weaknesses the core has and any partners you believe work well with the core.
- Here is a good example of what we look for taken from the ORAS iteration.
- Offensive Core: Should your core be an offensive one, such as Tapu Lele + Kartana, you could explain how those two Pokemon work together to break down their similar checks and any other synergistic traits. You could also mention any weaknesses the core has and any partners you believe work well with the core.
- This goes without saying, but do make sure your post includes the sets your core is using. In addition, please try to include an explanation of any EV spreads deviating from the standard 252 / 252. Replays are also very helpful and highly encouraged when posting cores.
- Please do not post a core that has more than 3 Pokemon because cores bigger than this can restrict building immensely.
- Please be respectful of the cores people post in this thread. If someone posts a core that you think is ineffective or just plain bad, there is no need to jump at their throats. With that said, constructive criticism is welcome and encouraged - simply be nice!


- We will carefully monitor the cores posted in this thread. When the time comes, we will look at the posted cores and decide which ones will be featured in the archive.
- While the selection of good cores can often be subjective, we will take into consideration a variety of aspects before deciding which cores are featured in the archive. This includes quality of explanation, effectiveness of the core in the current metagame, and so on. We will carefully discuss everything and seek feedback from the cores review councils.
- When we decide which cores will be featured in the archive, we will try to announce them and provide brief explanations behind why certain cores were selected and why certain cores weren't. This feedback can potentially help give people a clearer picture of what we are looking for.
- If a core is originally rejected from the archive, we can definitely provide some tips on how a set or spread can be tweaked so the core meets the standards we look for.
- Just like with anyone else who posts a core, please feel free to bring up any concerns you might have with our posts and/or the cores we select! However, please be sure to be polite, and if it is a simple question/concern, we'd prefer it being directed to us in a PM.
Explanations Coming Soon. Click on any of the Pokemon shown in the cores to view the sets.
Hyper Offense & Offense Cores
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Smeargle + Specially Offensive Yveltal + Darkinium Z Chi-Yu
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Deoxys-Speed + Dragon Dance Ultra Necrozma + Tera Dragon Meteor Beam Eternatus
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Choice Scarf Yveltal + Mega Diancie



Smeargle + Specially Offensive Yveltal + Darkinium Z Chi-Yu
Yveltal is near mandatory on any Sticky Web structure due to how effortlessly it maintains Sticky Web against most of the metagame while exploiting it to beat Pokémon which would otherwise counter it such as Taunt Calm Mind Arceus-Dark and -Fairy. Chi-Yu has overtaken Ultra Necrozma as the primary Z-move user on Sticky Web structures as its speedy Taunt helps maintain Sticky Webs while also filling the role of a stallbreaker and wallbreaker.
Sample:




Chi-Yu Webs by Emoxu9
Sample:









Deoxys-Speed + Dragon Dance Ultra Necrozma + Tera Dragon Meteor Beam Eternatus


Choice Scarf Yveltal + Mega Diancie


Zacian-C + Wallbreaker Primal Kyogre ('SwordFish')
The 'Swordfish' core fits on most hyper offense archetypes due to their offensive synergy. Zacian-C is a staple on hyper offense structures due to the offensive and defensive value it provides. Its typing and bulk provide resiliance against Extreme Killer Arceus and Marshadow - two of the biggest threats to hyper offense structures. Zacian-C's immediate power enables to cleave through many hyper offense structures without a boost while its Speed provides Speed control and a serviceable cleaner. Primal Kyogre is one of the strongest wallbreakers available and easily dispatches or chips Primal Groudon into Zacian-C range. Offensive Primal Kyogre forces progress on most defensive backbones and makes it easy for a teammate to clean up. Zacian-C also appreciates Primal Kyogre blitzing through Ho-Oh and Tera Water Zygarde, its other primary defensive checks on balance and bulky offense teams. Additionally, Primal Kyogre's ability to trade with specially offensive Yveltal means that Zacian-C does not have to waste its boost or risk getting smelted by Tera Fire Heat Wave.
Balance and Bulky Offense Cores




Defensive Primal Groudon + Offensive Ho-Oh + Calm Mind Arceus-Dark + Coil Zygarde ('GHAZ' )
The 'GHAZ' core defensively covers the majority of the metagame and fills many of the essential roles that a balance team wants: entry hazards, entry hazard removal, a Taunt user, and phazing. Consequently, this core can support nearly any two Pokémon in those last two slots. Some consideration should be given for removing Sticky Web as Ho-Oh can struggle to do it on its own and Tera Normal Silk Scarf Double-Edge Extreme Speed Arceus which blitzes through this core after a boost.


Special Utility Giratina-O + Alomomola
Giratina-O's typing is a double-edged sword that gives it fantastic or terrible defensive typing against most top-tier Pokémon. However, its bulk enables it to absorb some super effective hits by a hair. Although Giratina-O can frequently perform one or two important tasks, its longevity issues limit its potential contributions. Alomomola synergises well with Giratina-O as it can safely pass wishes on Pokémon such as Primal Groudon, Ho-Oh, and Zygarde. Alomomola doesn't check much by itself, but it and Giratina-O are capable of supporting structures ranging from bulky offense to semistall. Giratina-O + Alomomola structures outside of semistall typically include Primal Groudon which can operate much more aggressively due to the longevity provided by Alomomola's Wish. Alomomola's pivot support also helps position frail offensive threats such as Chien-Pao, Deoxys-A. Giratina-O + Alo cores provide at least a playable matchup against much of the metagame outside of Sticky Web structures as they heavily struggle to remove Sticky Web due to Yveltal and Chi-Yu. Although this core has longevity, its slower pace of play can leave it vulnerable to powerful breakers such as offensive Primal Kyogre and Dragon Dance Zygarde.



Calm Mind Arceus-Fairy + Choice Band Marshadow + Defensive Primal Kyogre
Arceus-Fairy is an excellent offensive-defensive Pokémon, but suffers from getting blown up by Ultra Necrozma and Choice Band Marshadow solves that with its great matchup into hyper offense and its wallbreaking abilities against balance and bulky offense structures. Its stellar matchup into stall is appreciated, but so is its ability to help out against threats such as Dragon Dance Zygarde and Dragon Dance Necrozma-DM.


Zacian-C + Wallbreaker Eternatus
This core fits on balance and bulky offense alike. Zacian-C covers Eternatus's major weakness in Calm Mind Taunt Arceus formes. It is also a great anti-offense Pokémon provided Sticky Webs are not present. Zacian-C is also an effective cleaner of the wreckage Eternatus leaves behind. Wallbreaker Eternatus enjoys longevity courtesy of Recover and is happy to play the long game against Pokémon such as Ho-Oh. Eternatus also helps a fair bit against stall as it can drain lots of PP due to Pressure, but assistance is needed. This core fits well on teams that can remove Sticky Web or are willing to sacrifice Eternatus to do so.


Choice Band Calyrex-I + Defensive Primal Kyogre


Choice Band Rayquaza + Zacian-Crowned


IDBP Garganacl + Coil Zygarde


Dragon Dance Necrozma-DM + Wallbreaker Eternatus


Defensive Primal Groudon + Ferrothorn


Fezandipiti + Deoxys-A
Stall Cores




Dondozo + Giratina + Chansey
Stall does not have much variation, but these four will always be present. Most of the development of stall comes from slightly tweaking EVs, moves, and Tera types to account for current metagame trends if necessary. There are other viable stall structures beyond the sample, but none have demonstrated staying power equivilant to the standard six.
Sample:




Sample Stall by the Council
Sample:






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