Hey, I thought I'd write here to detail a core that I've been experimenting with over the last few days as I've been inspired by the BS room to throw around a few ideas rather than just go through my teambuilding process solo as I usually do. This was originally, in part built vs. Darkinium for BSSC, but I did change it to be a bit less serious in that case. I apologise if this is mostly rambling.
Originally I wanted to build around mega metagross. The general reasoning for this is mega-gross is just a mega that has gone up a lot in my estimations over the last few weeks, simultaneously bulky whilst hitting hard without the need for set up and having good coverage. One thing that is great about it is its versatility. Iron head, Zen Headbutt, Bullet Punch, Ice punch, Rock Slide, Thunder Punch, Earthquake and Hammer Arm hits practically everything in the tier hard, it's just a matter of picking and choosing from there. Was likely to be max or close to max speed with just a few HP investment to take specific attacks.
Then I looked at some mons to go with metagross. Top priority was getting a decent earthquake switch-in. Landorus-T came to mind:
Landorus-T as I'm sure everyone knows is the most versatile of mons. Great EQ switch-in and has the intimidate ability to shut down a lot of physical threats. There were a few other reasons as well as this that I chose lando and more specifically a bulky lando for this team. It gave me firstly stealth rocks potential to break sashes as well as more importantly a slow u-turn. Had not thought of a spread at this point, but had an idea the team would be based around mons taking hits in order to get slow switches into hard hitters like Megagross.
Fini was the third. I just think Fini rounds out many cores great. It's just in general a mon that you can slot onto teams and it does well. Mamoswine, to use a theoretical mon with ground/ice coverage ruins the above duo, so fini is there to alleviate that. It also another switch-in to fire type mons. The misty terrain is useful when up against breloom. It starts giving the team some presence on the special side. In particular defensively, opposing landorus-t and hippowdon can be problems. Similar to lando, I knew fini was going to be bulky, max hp for sure, perhaps with defensive investment. I had the idea of a fast taunt here too which shuts down opposing fat like hippo, p2, cresselia which can be annoyances to the team.
After creating the above core, I thought of Naganadel. Knew the exact set and spread, being the standard plot Dev-drake set. This would give me a second recipient to u-turn. More importantly it constricts what opponents can bring at pokemon select screen. Very little asides from heatran can take all attacks from naga at +2, furthermore it is faster than most of the metagame.
From there, I wanted to round out my team. From here, I was looking for a slow u-turner if possible (it wasn't) and matchup specific stuff. Greninja, opposing Naganadel, thund-t, rotom-h, p-z come to mind. Originally this had mimikyu and rotom and greninja/mespirit and even magnezone on, but I have changed it over a few iterations. So I came up with my last two mons:
Snorlax is there basically to deal with Greninja and it does well in certain matchups where there lacks mons like mega lopunny. Fini can deal with waterium/torrent, but very difficult to predict greninja sets beforehand without potentially losing the game. Dark pulse, gunk shot, ice beam, not fun for my team. Cloyster is a third offensive threat behind mega metagross and naganadel that has to be respected and a emergency check due to sash. +2 can also revenge boosted P-Z. I wanted sash diggersby here instead, but it holds too much overlap.
So I came up with the following preliminarily:
https://pokepast.es/ba8b687a5d3ea7fc
Metagross:
HP investment was originally designed to live ghostium-z from jolly mimikyu (28 HP). 44HP/28SPD would allow to live modest specs lele's shadow ball 100% of the time which is of note. The speed investment outspeeds adamant mega salamence by 1 point and the rest is in attack. Am tempted to lower it further to 171 speed outspeeding nihilego and jolly chomper and adding a bit into attack. Unsure about this spread until further testing.
Other than that, standard gross set with max speed. Zen headbutt is there to deal with mega-venusaur which otherwise gives the team trouble, toxic is there to punish lure in bulk such as cresselia, porygon2, hippo, lando, the former two can be annoying. Have considered EQ/Thunder Punch over toxic as another measure for heatran and bulky waters but I think this is currently best, might try out TP a bit more though.
Landorus-T:
Originally I thought of rocks spdef lando, but have changed it to AV to help deal with special threats better. It lives 2 flamethrowers or double overheat from char-y, same with volcarona. Has the slower u-turn vs most opposing landos allowing to go into metagross or cloyster. Knock-off for bulky berry mons and p2. Lives all but 1 roll of tapu fini's modest max spa waterium-z. Can live 1 non-life orb ice beam from protean greninja also, giving the neccessary chip needed to naga to get beast boost. Still struggles with +2 Devastating drake from naga and P-Z's icebeam.
Tapu Fini:
Fast taunter helps deal with annoying fat like p2, aegislash and heatran. It's speed tier is so it outspeeds mega gyarados by 1 point and does not allow sub/dd in regular. Hydropump over Surf though the accuracy is annoying, it KOs mega blaziken without bulk 100% of the time. Moonblast is there just as standard stab for mega salamence. Natures madness for fat. The bulky berry just means it never dies except vs. breloom bullet seed, which case thats ok cause you can go most other mons and get setup.
Naganadel:
Just the standard set, you already know what it does. Was tempted to go a no nasty plot set with hp ground for heatran, but there are mons out there that naga can set up on like a lot of koko sets. Wonder if there is a bulky spread that might work.
Snorlax:
This boy is slept on quite a lot. After a few curses he can wind up opponents. The Hp/Def investment is as high as can be but low enough to make sure sacred sword from aegislash always puts lax in berry range making it a 3HKO. Same with return from mega salamence. On special sides has a few key benchmarks like being able to recycle stall Char-y of sun for the most part or just 1v1ing depending on your feel and taking +1 infernal overdrive from volc. I've played around with fire punch vs. Earthquake. I think EQ is probably better overall but fire punch does have its uses vs freeze from fat like cress/p2 and hits celesteela.
Cloyster:
There just as a secondary sweeper and sash check, pretty standard set I think.
Anyways, was posting this to see if I could get any feedback and throw a few things around. I have some ideas myself and am kind of changing it as I go along.