Overview
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Greninja is a decent Pokemon in the metagame. It has a very high Speed stat that allows it to function well as a suicide lead in Ubers. Furthermore, Greninja has a great signature ability in,(AC) Protean,(AC) which allows it to switch its type depending on what move it uses, meaning it can easily play around opponents. Greninja also has a huge coverage movepool with both a lot ofmany status moves as well as a lot of physical and special moves. However, one of Greninja's downsides is its mediocre offensive stats. It also is pretty frail because of its low HP stat along with prettynd low defenses. Additionally, Greninja also can be stopped quite easily by faster offensive attackers. And lastly, Greninja faces huge competition from the Deoxys- formes(no hyphen) as a suicuide lead, butalthough its niche lies in Greninja having access to Toxic Spikes, as well it can spinblock Rapid Spin by itself because of Protean Shadow Sneak and Protean.
Suicide Lead
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name: Suicide Lead
move 1: Toxic Spikes
move 2: Spikes
move 3: Taunt
move 4: Shadow Sneak
ability: Protean
item: Focus Sash
evs: 252 Atk / 4 Def / 252 Spe
nature: Jolly
Moves
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Toxic Spikes is an entry hazard form that affects all Pokemon on the switch in bar those immune to it, and it eventually wears down most Pokemon after 2 layers of Spikes. Spikes is another hazard form whichthat hurts the opponent on the switch in bar those immune to Ground-type attacks, and also removes the effect of any potential Focus Sash. Taunt prevents the opponent from using any status attack against Greninja, most notably Defog that can remove the hazards Greninja has set up. Shadow Sneak allows Greninja to change its typing to Ghost, and therefore blocking Rapid Spin, as well ahelps it picks off weakened Pokemon,(AC) and also helps Greninja beating Deoxys-Attack. Hydro Pump is another option to use in a moveslot to hit Mega Diancie for super effective damage, which is important as Mega Diancie bounces hazards back and can OHKO Greninja with a super effective(super effective is two words) Moonblast. Other notable targets are Mega Sableye.(Just expand this part a little bit)
Set Details
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Protean is the standard ability to use onallows Greninja, as it allows it to play around with the opponent by changing its type every time it uses a move with a different typing. Focus Sash is the chosenbest item because it prevents Greninja from being OHKOed as a lead, and with that it guarantees that it will be able to get up a hazard or Taunt a Pokemon. The EVs give a boost to Attack andEVs help Greninja to 3HKO Deoxys-Speed, and the EVs in Speed EVs help Greninja to outspeed Arceus variants andso this wayat it can Taunt them ifbefore they try to set up on you. TheA Jolly nature backs up the EVs and helps it to outspeed up to Pokemon with a base Speed stat of 120 or lower, such as Mega Salamence. If Greninja runs Hydro Pump, make sure to use an EV spread of 4 Def / 252 SpA / 252 Spe along with a Timid nature because this allows Greninja to OHKO Naive Mega Diancie if it tries to switch in.
Usage Tips
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Use this Greninja works best as a lead except, although you must be careful when predictdealing with Magic Bounce users such as Mega Sableye and Mega Diancie to wanna come in, and try to get up your hazards as soon as possible. Set up Spikes and Toxic Spikes depending on the opposing team; Spikes troubles bulky offense teams that rely on bulk to stop offensive Pokemon, and while Toxic Spikes beats up defensive teams by dealing damage every turn. Use Taunt when predicting the opponent to set up on you or,(AC) when they are trying to use Defog, or when the opponent is trying to set up their own hazards. Shadow Sneak is the best option to use if you predict the opponent towill try andto Rapid Spin away your hazards, and also is the best if Greninja functions as an anti-lead because it beats common leads such as Deoxys-Attack and Deoxys-Speed.
Team Options
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Support from offensive Pokemon such as Mega Gengar, Mega Salamence, Genesect,(AC) and Primal Groudon is good because it disallowprevents the opponent tofrom useing Rapid Spin or Defog after Greninja has fainted. Other Taunt users such as Yveltal or Darkrai that can prevent the opponent from removing the hazards bywith Defog are useful once Greninja has fainted. Aside from those. Pokemon that can deal with a Darkrai lead such as Mega Diancie make for good partners too, because it will bounce back Dark Void which would prevents Greninja from setting up hazards. However, when predicting the opponent with Darkrai, lead with Diancie, as it won't bounce back hazards when it switches in in normal formas regular Diancie. Furthermore, Primal- Groudon(no hyphen) is another good partners as it can set up Stealth Rock, but alsond benefits from the Toxic Spikes as it wears down its defensive checks. Pokemon such as Mega Salamence, Kyurem-W, and Darkrai that appreciate having hazards on the field to net KOs more easily make good partners. Other examples of good teammates include Mega Scizor and Primal Kyogre, which beat Mega Diancie, and Xerneas, which beats Mega Sableye. Pursuit users, such as Tyranitar or Aegislash, can help to trap Latios and Latias which can try to Defog once Greninja has fainted. Powerful U-turn users such as Scizor and Landorus-Therian make good partners too, as they can lead and hit opposing Deoxys- formes with U-turn(remove hyphen), and then switch into Greninja, which can beat it with a Shadow Sneak after. Lastly, Pokemon that benefit from Toxic Spikescan flinch the opponent, such as Shaymin-Sky or Mega Kangaskhan, can flinchbenefit from the opponent and stall turn(s) while Poisonpoison damage that Toxic Spikes does damage.
Other Options
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An all-out set attacking set where Greninja benefits from the coverage achieved by access to new moves such as Gunk Shot, (which can OHKO Xerneas), Low Kick, and Grass Knot, (which can 2HKO Primal Groudon), is usable, but such a set is largely outclassed by Deoxys-A because of its superior offensive presence. U-turn can be used forby Greninja to keep upmaintain momentum and switch out of its checks and counters, but Greninja cannot miss out on any its current moves as it will lack either a hazard, a block to Defog, or a block to Rapid Spin. Additionally, Haze is an option to remove eventual stat boosts, butalthough Taunt disallowprevents the opponent tofrom setting up on Greninja anyway, and therefore isn't worth it.(It's probably worth it a little bit, otherwise you wouldn't even need to mention it.)
Checks & Counters
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**Darkrai**: Darkrai outspeeds Greninja and puts it to sleep with Dark Void, preventing it from setting up hazards. However, it doesn't like taking a Gunk Shot.
**Magic Bounce**: Magic Bounce users such as Mega Sableye and Mega Diancie bounce back the entry hazards Greninja tries to set up,(RC) and can beat it with one of their attacks.
**Taunt**: Faster Taunt users such as Darkrai and Deoxys-Speed can taunt Greninja, disallowpreventing it tofrom setting up Spikes, though the latter needs to be wary of Shadow Sneak.
**Strong priority**: As Greninja is a bit frail, strong priority such as an Extreme Speed(two words) from Deoxys-Attack or Arceus can quickly bring Greninja quickly to its end.