Beast/Earth
85/130/70/60/70/105
Overview- Very powerful - 105 Speed is pretty quick and 130 Attack hits really hard.
- Excellent dual STAB combination combined with Rock Head and two 120 BP STABs make Attack Keine a powerhouse capable of tearing through even the best physical walls.
- Useful resistances to Ghost, Wind (immunity), Earth, and Miasma.
- Weaknesses: Frail, no priority, suffers from common weaknesses to Nature, Flying, and Water (x4 weakness).
Standard Attacker-Head Smash
-Double-Edge
-Steel Fist
-Poison Jab / Ice Punch
Item: Special Bloomers / Sports Sweater
Nature: Jolly (+Spd / -SpA)
Ability: Rock Head
EVs: 252 Atk / 4 Def / 252 Spd
Attack Keine is ridiculously strong with the Special Bloomers equipped. To put it into perspective, her Head Smash 2HKOes 252 HP/252 Def Bold Defense Tenshi with 1 layer of Spikes, guaranteed. Yikes.
Thanks to Rock Head eliminating self-inflicted recoil damage, Attack Keine can freely use Head Smash and Double-Edge with no drawbacks, which will almost assuredly devastate anything that isn't a Flying-type or a Nature-type. Steel Fist crushes most Flying-types on a predicted switch, and is particularly useful for eliminating bulkier flying-types such as Tenma. Poison Jab wastes most Water- and Nature-types, and is particularly fatal to Defense Kaguya and Star Sapphire. However, Ice Punch allows Keine to cover Flying- and Nature-types in one move to ease prediction, and it also allows for the super-effective hit on Nature/Earth types. It loses the coverage on Water-types, but most of them won't enjoy a Head Smash anyway.
EVs are a standard sweeper spread, nothing new. Jolly is preferred for the nature as Attack Keine's 105 Speed is quite nice for such a powerhouse. Although Special Bloomers is the primary item, one can opt to use the Sports Sweater to keep Head Smash powered up (or the Bunny Costume for Double-Edge) to give Attack Keine freedom to change attacks while still maintaining respectable power.
Other OptionsIntimidate is Attack Keine's other ability. It is quite a good one, and it can be used to afford to Attack Keine more opportunities to switch in. She does have the option of using Earthquake and Crush Claw as "safe" STABs with Intimidate, but the drop in power is significant and usually isn't worth it. Thunder Wave is an interesting option that can allow Attack Keine to cripple a potential revenge killer, but she is usually just better off plowing their face in with one of her powerful attacks. Taunt can shut down walls who are trying to set up, but again, Attack Keine is usually just better off straight up attacking. Attack Keine causes a lot of switches, so Pursuit is a good option to ensure runners don't get off scot-free.
TeammatesAttack Keine loves Spikes as they help her break down walls, and she also forces a lot of switches. Speed Aya is a particularly good partner as she can also Baton Pass Keine Speed Boosts. She also resists Attack Keine's weaknesses to Nature- and Flying-type attacks. Reliable Water-type counters are a must due to Attack Keine's x4 weakness, so Nature-, Faith-, and Wind-type puppets tend to make good partners. A Puppet that can take advantage of Attack Keine's ability to break walls is also helpful - rain sweepers such as Attack Murasa and Nitori are particularly good since Attack Keine tends to bait and weaken enemy Water- and Nature-types. Other physical sweepers such as Youmu also work well to pick off what Attack Keine has punched holes in.
CountersAttack Keine's sheer power makes her tough to counter, mainly because switching in is a daunting task. Most Flying- and Nature-types work well as they resist Attack Keine's STAB attacks and can pick on her weaknesses. Aya forms, Defense Kaguya, and Star Sapphire are among the best choices so long as they avoid Attack Keine's coverage moves. Helper Star Sapphire is probably the best general answer to Attack Keine, only really fearing Poison Jab. Very durable physical walls such as Kikuri can weather a few hits and Toxic stall Attack Keine, but doing so is difficult due to her sheer damage output and the risk of taking a critical hit.
Thankfully, Attack Keine is much easier to revenge kill. Anything with a strong Water-type or Nature-type attacks with a Speed stat greater than 105 can usually fell her in one blow. Aqua Jet is like Kryptonite to her, as she cannot counter with any priority of her own.
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Attack Keine is really good. :V