Meet Kyurem, when he was first introduced to players he was a corpse of his former self, both literally and in the lore until he met his soulmates Zekrom and Reshiram
Initially Kyurem was the underdog of the trio, he did have alot more going for him than his counterpart Zygarde in the form of his typing, while a bit redundant he has an incredible offensive typing, while defensively not so much.
Even though Pokemon like Mantine and Magneton exist, Kyurem was the first Pokemon to openly be discussed as THE fusion Pokemon, harnessing the DNA Splicers Kyurem can become of two forms, the physical Black Kyurem or the tactical White Kyurem.
Both of these forms operate very differently and this makes Pokemon #646 very versatile.
Zombony
Kyurem @ Choice Specs
Ability: Pressure
EVs and Nature:
EVs: 252 SpA / 4 SpD / 252 Spe
Timid/Modest
-Draco Meteor
-Ice Beam
-Earth Power
-Focus Blast/Flash Cannon/Dragon Pulse
This is a full on offensive normal Kyurem set, maximum SpA and speed investment is suggested for it to hit as hard and fast as possible, Kyurem boasts a very wide movepool to let it hit any type for super effective damage.
Draco Meteor is a very devastating attack coming off a base 130 SpA Kyurem holding Choice Specs and STAB to boot, however it does come with that nasty SpA drop, meaning Kyurem might need to switch out more frequently, be careful of keeping the hazards especially Stealth Rocks off the field
Ice Beam is a very good move for any Pokemon, but the Ice Type Kyurem unlocks its full potential
Earth Power is for coverage, it hits Dialga and Primal Groudon consistently, and it also destroys Heatran and other Steel Types which otherwise walls Kyurem
The last slot is a toss up, while Focus Blast may seem unnecessary given how Earth Power does more or less a good job at covering Steel and Rock types, it's power cannot be denied, Focus Blast from this Kyurem set also 2HKOs Blissey and 1HKOs all non-Assault Vest Tyranitars even in Sand (with an 86% chance to 1HKO those with AV in sand)
Alternatively you can go with Flash Cannon, this is for fairies such as Florges which are a 2HKO
Or you can forgo the suggested options for Dragon Pulse, this is for more consistent use while Draco Meteor is not, this hits other Kyurem, Kingra and Palkia, Dragon Pulse is also the only option Kyurem has against bulky Water types such as Suicune.
Frostbitten Dragon
Kyurem- Black @ Leftovers/Lum Berry
Ability: Teravolt
EVs and Nature:
EVs: 252 Attack / 4 HP / 252 Spe
Adamant/Jolly
-Dragon Claw/Outrage
-Fusion Bolt
-Substitute/Iron Head
-Roost/Outrage
Kyurem-B is an odd case here, it's a physical powerhouse that has severe drawbacks regarding it's movepool, it learns no physical Ice attacks bar one, that one is completely unviable save for one gimmick, many resolve to running a mixed Kyurem-B but I'd like to focus on a set that takes advantage of that godly Attack stat.
Kyurem-B's Outrage is the strongest Outrage in the entire game baring a certain Mega-Evolution, maximum Attack investment and an adamant nature further that, but for speed creep purposes Jolly can be used, maximum speed should be invested irregardless as Kyurem-B's speed is in a purgatory, not quite there in the land of base 100s.
It is also a physical attacker so it is prone to burns, a Lum Berry will either save it from that burn drop once or cure it's confusion for another few turns of Outrage.
Fusion Bolt gives what normal Kyurem cannot do, threaten bulky Water types such as Slowbro, Manaphy, Suicune and Azumarill
Substitute is there for utility which furthers Kyurem-B's longevity if used alongside Roost.
Iron Head however is there for Fairies such as Clefable and both forms of Diancie
Roost is for healing, this can be traded for the raw power of Outrage even using it alongside Dragon Claw, like the Draco Meteor/Dragon Pulse debate,
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