Well, answering your question is quite the challenge since it is very hard to resist ripping of the excellent cores that are listed on this page
However I guess I shouldn't be lazy and try to come up with cores that could actually work with a pairling
Anyways I will list some that I think are quite good
Starmie| Salamence| Jirachi/Metagross
The one to pair with the original core, Salamence and Jirachi/Metagross should be Starmie.
Starmie's main purpose is to serve as a status aborber, something that Metagross/Jirachi and Salamence don't take so well as they can't afford being induced by sleep, paralysis, burn and or toxic(Salamence). Salamence and Jirachi/Metagross already serve as an excellent core, this is because of the following reasons:
- Salamece's Ice, Rock and Dragon weakness are all perfectly covered by Jirachi/Metagross respectively
- Metagross's/Jirachi's Ground and Fire type weakness is completely covered by Salamence
- Both can run Mixed sets if used well since they both have a pretty nice Special attack and a very high Attack stat
This core has always been very loved, but it's sole weakness was status moves. Starmie is the best Status absorber due to the fact that it has a great ability in Natural Cure. Not only does it help absorb their main weakness, it also helps them cleans physicall walls out of their way. Skarmory, Gliscor, Hippodown are no more once Starmie arrives on the field. However it should be wary of Crunch
I am pretty sure that you would actually like to know the movesets that I would recommend running with this core, so I will add them:
Starmie @ Life Orb
Trait: Natural Cure
EV's: 4Def/ 252SpA/ 252Spd
Timid Nature
- Surf
- Ice Beam
- Thunderbolt
- Rapid Spin/ Signal Beam/Psychic
Metagross @ Lum Berry/Leftovers
Trait: Clear Body
EVs: 252HP / 220Atk / 36Spd
Adamant Nature
- Rock Polish
- Meteor Mash
- Earthquake
- Ice Punch/Thunder Punch/ Zen Headbutt
or
Jirachi @ Choice Scarf
Trait: Serene Grace
EVs:252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Iron Head
- Ice Punch
- U-turn
- Healing Wish
and
Salamence@ Life Orb
Trait: Moxie
EVs: 64 Atk / 192 SpA / 252 Spe
Naive Nature
- Draco Meteor
- Outrage
- Fire Blast
- Earthquake
Any set could really go but I would personally use this set to keep the roles a little in balance
I suggest a Rock Polish/Agilitysweep set for Metagross because although it is common, it remains deadly as it can survive a Thunder Wave/Will-O-Wisp due to Lum berry, and after that most likely kill a lot of Pokemon of because of the 2X increase in speed. Rapid Spin or full-out-attacker on Starmie. I suggest using rapid Spin, to prevent the Stealth Rocks and the Spikes from doing damage to it's teammates and itself. Scarfrachi is pretty nice. With U-Turn you can now easily switch out to Salamence whiles doing damage since you know Salamence has it's back covered. Mixed Sweeper for Salamence just so you will not be rendered completely useless when you are facing physicall walls such as Ferrothorn, Skarmory, Gliscor etc
If I can think or if I find more, I will add them but as for now, this is it :)
