So when I checked the RMT, I saw it filled with teams that had cores inside. It brought me to try to make my own cores that I discussed with Faked Thrower yesterday night. Smogon may have their own cores, but it doesn't mean we can't find cores that work efficiently.
So many unexperienced members of this site may ask: What is a core? Smogon has this covered, providing an awesome explanation.
A core consists of 2-3 Pokémon that work well together through Defense, Offense, both, or through other ways to counter most of the metagame. This makes having a solid core one of the most important parts of team building. - Smogon University
Now, there is a lot of different types of cores. Smogon has this covered as well.
There are four different types of cores and they are as follows:
Defensive: This core consists of 2-3 Pokémon that compliment each other defensively. They are designed to counter a wide range of
threats through bulk and synergy, while taking resisted and neutral
hits with relative ease.
Offensive: This core is made up of Pokémon that have great coverage and power so that they can take out a wide range of threats
in the tier.
Mixed: This core consists of Pokémon that synergize well both offensively and defensively. For this type, you may have two walls and
one offensive Pokémon that all have great synergy and work well
Other: This includes Pokémon who work together in other ways. Like a Toxic Spikes user and a Substitute + Calm Mind sweeper. Or a Spiker
and a Pokémon with a lot of power but not enough to break through
walls without Spikes. Even a lure and a sweeper can count as a
combinations. - Smogon University
So I was thinking we could post our favorite cores on this Q! If you post, please include EVs, Natures and everything else in a full moveset. Also, include what type of core yours is (Offense, Defense, Mixed or Other) and in what tier your core can be used and performs the best. Add a short description explaining your core. I'll be posting a core just to show the format in which you should answer.
This is an Offensive core for use in the UU Tier. Darmantian-Z and Roserade provide great offensive synergy while Darmanitan can use Belly Drum to safely render himself to Zen Mode. BLA BLA BLA.
To note that that was an example and you should put a bigger description. xD
Remember, there is no such thing as a perfect core. Don't get too arrogant about your core and saying that, for example, your Leavanny could own your Dialga. Make a usable core, meaning no gimmick such as Specs Delibird or Banded Blissey. I hope you guys will post your cores here so everyone who visits this Q will get ideas for new cores and teams.
Have fun posting your cores and DO NOT post Smogon cores, we can just go see them there.