Serperior

Overgrow
Boosts power of Grass-type moves by 50% when at 1/3 HP or less.
Contrary
The wielder's stat changes are reversed.
Type Tier
Grass NU
Level 100 Statistics (see level 5, 50, 100)
Min- Min Max Max+
HP
75
- 291 354 -
Atk
75
167 186 249 273
Def
95
203 226 289 317
SpA
75
167 186 249 273
SpD
95
203 226 289 317
Spe
113
235 262 325 357

Overview

Despite his regal appearance, Serperior is anything but out of the ordinary. With a sparse offensive movepool, Serperior has only a few qualities that allow him to stand out when compared to other Grass-types. Thanks to a great base 113 Speed, Serperior is naturally faster than the entire tier, sans Ninjask, Swellow, and Swoobat. Serperior has a plethora of support options available, including dual screens, Glare, Leech Seed, Taunt, and Safeguard. Additionally, Serperior has admirable 75 / 95 / 95 defenses, allowing him to easily set up one of his boosting moves or Leech Seed safely from behind a Substitute.

Name Item Nature

Substitute + Calm Mind

Leftovers / Life Orb Timid
Moveset EVs
~ Calm Mind
~ Substitute
~ Giga Drain
~ Hidden Power Rock
4 HP / 252 SpA / 252 Spe

Serperior can use his solid bulk and great Speed to set up a Substitute on Pokemon such as Regirock, then proceed to comfortably boost his Special Attack and Special Defense with Calm Mind. Even with Serperior's initially mediocre offensive prowess, his power increases dramatically after a boost or two, and his Substitutes become nearly unbreakable from the special side. Giga Drain is the preferred STAB move, as it quickly recovers health lost from Substitute. Hidden Power Rock provides the best coverage with Giga Drain, as it hits Bug- and Flying-type Pokemon super effectively, and the majority of Steel-type Pokemon in NU are neutral to Grass-type moves. The decision between Leftovers and Life Orb is mostly a matter of reliability versus power; when using Leftovers, Serperior recovers a small amount of HP each turn behind his Substitute, while Life Orb allows him to hit much harder off the bat. However, it must be noted that Substitute and Life Orb will wear down quickly on Serperior, emphasizing the need for Giga Drain.

Team Options & Additional Comments >>>
Name Item Nature

SubSeed

Leftovers Timid
Moveset EVs
~ Leech Seed
~ Substitute
~ Giga Drain
~ Hidden Power Ice / Taunt
252 HP / 4 Def / 252 Spe

All of Serperior's strengths flow together nicely in this set—his great Speed, solid defenses, and access to Taunt all enable him to be an effective user of the SubSeed combination. The strategy is fairly simple: switch in to a Pokemon that Serperior scares out, such as Golem, Regirock, or Alomomola, and set up a Substitute. From there, you can Leech Seed the switch-in and alternate between Substitute and the appropriate attacking move until Serperior scores a KO. Serperior is the fastest available user of this strategy in NU, sans Prankster Cottonee and Chlorophyll Jumpluff in the sun. Giga Drain gives Serperior a STAB move and provides extra recovery, if necessary. Hidden Power Ice is the preferred option for the fourth slot, as it nails the many Grass-types, who are immune to Leech Seed, for super effective damage. It also has solid coverage with Giga Drain, hitting the Dragon- and Flying-types that resist Giga Drain for heavy damage. Taunt, on the other hand, prevents opposing Pokemon from using a status move on Serperior, or a recovery move such as Wish. It also blocks any attempts to phaze Serperior via Roar or Whirlwind.

Team Options & Additional Comments >>>
Name Item Nature

Dual Screens

Light Clay Timid
Moveset EVs
~ Reflect
~ Light Screen
~ Taunt
~ Giga Drain / Leech Seed
252 HP / 4 Def / 252 Spe

Serperior is one of the fastest users of dual screens in NU, and when coupled with Taunt and his good bulk, Serperior makes for an excellent support Pokemon to aid a teammate's setup or sweep. Taunt prevents opposing Pokemon from trying to set up or Taunt Serperior while he is putting up Reflect and Light Screen. It also prevents the opponent from using a status move on Serperior or the incoming sweeper, which can often lead to a clean sweep. Giga Drain provides Serperior with a reliable STAB move and recovery, while Leech Seed steals opposing Pokemon's health and can be passed to a teammate. Light Clay is the preferred item, as it gives Reflect and Light Screen eight turns of longevity as opposed to the usual five.

Team Options & Additional Comments >>>
Name Item Nature

Coil

Leftovers Adamant / Impish
Moveset EVs
~ Coil
~ Substitute
~ Leaf Blade
~ Dragon Tail
32 HP / 252 Atk / 224 Spe

Despite a physical movepool consisting of largely Grass- and Normal-type moves, Coil is a surprisingly effective move on Serperior. The overall strategy of this set is largely the same as the others: switch in on a Pokemon whom Serperior threatens, such as Golem or Alomomola, set up a Substitute, then proceed to stack boosts with Coil. Although the Attack boost is important, the Defense and accuracy boosts provided by Coil are even more vital to the success of this set: the former makes Serperior's Substitute nearly unbreakable by a physical move after a few uses, and the latter erases Dragon Tail's 10% chance to miss. Leaf Blade is Serperior's best physical STAB option, but Dragon Tail is the key attacking move on this set; because Serperior is naturally faster than all common phazers, he can use Dragon Tail to phaze them before they can attempt to do so. It also helps Serperior handle Pokemon who can break his Substitutes, such as Swellow, by forcing them out, allowing Serperior to set up another Substitute and continue to rack up entry hazard damage.

Team Options & Additional Comments >>>

Other Options

Serperior has few other options outside of those listed. He gets Glare, which is an interesting move in its own right, but there are more reliable Pokemon to spread paralysis. Gastro Acid is useful to cripple Pokemon who rely entirely on their ability, such as Swellow, but the effect ends as the opposing Pokemon switches out and thus is hardly ever worth the moveslot. Serperior can set up Sunny Day for other Chlorophyll-abusing teammates, but cannot make use of it himself. Additionally, Serperior's Grass typing is redundant with most Chlorophyll Pokemon, compounding common weaknesses. Safeguard blocks status, but Taunt is usually superior as it also prevents phazing and setup. Torment is a curious option, but Serperior doesn't have the typing and resistances to use it effectively. Aromatherapy removes all status afflictions from the team, but this is a job better left to the likes of Lickilicky. Leaf Storm is Serperior's most powerful attack, but the Special Attack drop makes it generally a bad idea, especially considering Serperior's already low Special Attack stat.

Checks and Counters

Miltank has no problem switching in on the majority of Serperior's sets, as it has Sap Sipper to absorb Grass-type moves and can consistently break Serperior's Substitutes with Seismic Toss or Body Slam. Opposing Grass-types, such as Leafeon and Vileplume, can handle the SubSeed set well unless Serperior is using Hidden Power Fire. Likewise, Duosion and Kadabra are not affected by Leech Seed thanks to Magic Guard, and both can set up Calm Mind. Swellow and Choice Scarf Braviary both outspeed Serperior and can break his Substitutes with U-turn or simply KO with Brave Bird. Toxic Spikes deals with all Serperior sets fairly well, as most revolve around Serperior utilizing Substitute to avoid status. Garbodor and Whirlipede are two of the few Toxic Spikes users in the tier, and both can easily switch into Serperior's Grass-type moves.

Unreleased

Serperior's Dream World ability, Contrary, inverts stat changes, making stat drops become boosts and vice versa. Leaf Storm is the only move that Serperior receives that lowers his stats, but effectively receiving +2 on every use of Leaf Storm quickly adds up, making Serperior a dangerous sweeper.