Porygon-Z

Download
User gets a stat boost depending on its opponent's stats.
Adaptibility
User's STAB modifier becomes x2.
Type Tier
Normal OU
Statistics
Min- Min Max Max+
HP
85
- 311 374 -
Atk
80
176 196 259 284
Def
70
158 176 239 262
SpA
135
275 306 369 405
SpD
75
167 186 249 273
Spe
90
194 216 279 306
Name Item Ability Nature

Nasty Plot sweeper

Leftovers / Life Orb Adaptability Modest / Timid
Moveset EVs
~ Nasty Plot
~ Tri Attack
~ Dark Pulse
~ Hidden Power Fighting / Ice Beam / Hyper Beam
4 HP / 252 SpA / 252 Spe

Porygon-Z can run a standard Nasty Plot setup. Adaptability makes Tri Attack, already a powerful move, almost unstoppable. The other attacks are up to preference—Hidden Power Fighting and Dark Pulse cover the resistances to Porygon-Z's Normal STAB, but for a Wi-Fi team, Ice Beam may be preferable. Hyper Beam is risky but has some excellent payoff—after a Nasty Plot, Life Orb Hyper Beam will bring down a 714 HP / 306 SpD Blissey in one hit. Just watch out for revenge kills. Timid can be used to outrun neutral base 100 Speed threats such as Salamence. It also outspeeds neutral Speed Garchomp, which can be handy.

Name Item Nature

Choice Specs/Scarf

Choice Specs / Choice Scarf Modest / Timid
Moveset EVs
~ Tri Attack
~ Hidden Power Fighting / Thunderbolt
~ Dark Pulse
~ Ice Beam
4 HP / 252 SpA / 252 Spe

Standard Choice sets work very well with Porygon-Z's high power. Choice Scarf may even be preferable, as Porygon-Z is faster than Heracross but still slower than many other OU threats. Timid can be used with Choice Specs to outspeed neutral natured base 100 Speed Pokémon, but with Choice Scarf, Timid Porygon-Z outspeeds Adamant Choice Scarf Garchomp as well. Download gives you a free boost in all of your attacks, but it completely depends on who you are switching to.

Name Item Ability Nature

Mixed Sweeper

Life Orb / Silk Scarf Adaptability Rash
Moveset EVs
~ Return
~ Nasty Plot
~ Tri Attack
~ Dark Pulse
220 Atk / 72 SpA / 216 Spe

The idea here is that, between Life Orb and Adaptability, Return will do 53% minimum to Blissey, which is a 2HKO. If Life Orb makes you queasy, you can max Attack and use Silk Scarf, which gives you about a 50% chance to 2HKO Blissey even with no residual damage. With Blissey no longer a threat, Porygon-Z is free to sweep with Nasty Plot.

Other Options

Agility is useful for late-game sweeps, since many Pokémon will surpass Porygon-Z's 90 base Speed; it can be substituted over Nasty Plot in the first set, and you can distribute most of your Speed EVs to HP—48 Speed EVs will give you enough Speed to beat out Choice Scarf Garchomp. Substitute can be used to block status from something like Blissey and then set up a sweep. Porygon-Z's other trait, Download, is very potent, but Adaptability is more reliable, making it preferable. Hidden Power Ground allows Porygon-Z to deal with Metagross and is able to OHKO Heatran and Magnezone without any boosts.

EVs

For purely special attacking Porygon-Z, Special Attack and Speed should be maximized for both Modest and Timid natures. A few common Pokémon, most importantly Lucario, coexist with Porygon-Z at 90 base Speed, so maximum Speed ensures it ties with them at worst. The mixed attacker needs to pour a lot of EVs into its Attack to 2HKO Blissey; as such, it might only invest 216 EVs into Speed for 270, which outruns neutral Speed nature Heracross, so it can put at least some into its Special Attack.

Opinion

Porygon-Z is like Medicham—very, very scary, but hampered by its only moderate Speed and frailty, as well as lack of resists. In the late game, this Pokémon could very well clean up a battle. This is definitely something to take into account when making your team.

Counters

Probopass and Registeel are the best counters in the game given their high Special Defense and resistances to Porygon-Z's best attacks, unless Porygon-Z carries Hidden Power Fighting. Spiritomb (with Hidden Power Fighting) is immune to Porygon-Z's STAB attacks, and isn't weak to anything. Tyranitar, Metagross, Heatran, and Blissey can generally take a hit from Porygon-Z. Otherwise, the best counter is something faster than can take advantage of Porygon-Z's frailty.