Ruby, Sapphire & Emerald — Competitive Reference
Generation 3 introduced abilities, natures, and the modern EV system simultaneously. The ADV (Advance) era is the foundational generation of modern competitive Pokémon — Smogon's tier hierarchy, Sleep Clause, and Singles 6v6 format were all formalised here.
Released
March 2003
Region
Hoenn
Mechanics
Abilities + Natures + EVs
Sequel
Emerald + FRLG
Three concurrent additions — abilities, natures, EVs — that together produced the customisable Pokémon. Every gen since has built on this foundation.
At a glance
ADV is the foundational era of modern competitive Pokémon. Before Gen 3, customisation existed (DVs, stat experience) but was coarse-grained. Gen 3 introduced fine-grained control — abilities, natures, and the granular EV system — that the franchise has used ever since.
Smogon's competitive infrastructure was also formalised in this era. The OU / UU / Ubers tier hierarchy, the Sleep Clause, the Species Clause, the 6v6 Singles format, and the canonical "ban-by-Pokémon" approach all date to ADV-era community decisions. Modern competitive Pokémon is, in structural terms, ADV with three more decades of refinements layered on top.
- ReleasedMarch 2003 (Ruby & Sapphire, Japan)
- SequelsEmerald (2004), FireRed & LeafGreen (2004)
- RegionHoenn (RSE), Kanto remake (FRLG)
- Signature additionsAbilities, natures, modern EV system, weather-summoning abilities, Doubles format
- Type chartUnchanged — same as Gen 2 onward
- Notable rule changeEVs capped at 252 per stat, 510 total (was uncapped in Gen 2)
- Singles tiersUbers, OU, UU (BL → ban list intermediates introduced)
- DoublesFirst mainline support — VGC formats begin in 2009 but Doubles existed in-game from Gen 3
Abilities, natures, EVs
Three customisation systems arrived in Gen 3. Each one would have been a generational change on its own; together they reset what a competitive Pokémon could be.
Abilities
Every Pokémon now has an ability — a passive effect that triggers under specific conditions. Some abilities are purely flavour (Run Away, Pickup); others reshape competitive identity entirely (Levitate, Wonder Guard, Intimidate, Speed Boost). Many Pokémon have two ability options; the chosen one is set at hatch / capture.
Natures
25 natures, each granting a +10% boost on one stat and a -10% reduction on another. Five natures are neutral (no boost, no reduction). The system lets a single Pokémon be tuned for offense (Adamant: +Atk -SpA, Modest: +SpA -Atk), Speed (Jolly: +Spe -SpA, Timid: +Spe -Atk), or bulk (Bold: +Def -Atk, Calm: +SpD -Atk).
25
Total natures
20 boost-and-reduce + 5 neutral
±10%
Stat shift
One stat boosted, one reduced
252
Max EVs per stat
510 EVs total across the 6 stats
31
Max IVs per stat
Up from 0–15 DVs in Gen 2
The modern EV system
Pre-Gen 3, EVs (then called stat experience) were an open-ended system — a Pokémon could max its stat experience to 65,535 in every stat by grinding wild encounters. Gen 3 introduced the cap that has stayed for 20 years: 252 EVs per individual stat, 510 EVs total across all six stats. The trade-off forced players to specialise.
Weather-summoning abilities
Drought, Drizzle, Sand Stream and Snow Warning all originate in Gen 3 — but with very limited distribution. Drought belonged to Groudon; Drizzle to Kyogre; Sand Stream to Tyranitar.
The mechanic was the same as Gen 5's permaweather (5-turn cap arrived in Gen 6), but the carriers were different. Without Politoed having Drizzle and without Ninetales having Drought (those came via Dream World in Gen 5), Gen 3 OU had Sand Stream as the main weather effect. The Tyranitar + Sand pivot pattern that defined Gen 5 OU was already present in ADV.
- Drought on Groudon — permanent Sun. Ubers-only in Gen 3.
- Drizzle on Kyogre — permanent Rain. Ubers-only.
- Sand Stream on Tyranitar — permanent Sand. Legal in OU; defining Gen 3 weather setter.
- Snow Warning did not yet exist — introduced in Gen 4.
Battle mechanics baseline
Gen 3 inherited Gen 2's engine values with a few clarifications. The substantial mechanical work was on the customisation side, not the combat math.
1/16
Crit rate
Pre-Gen 7 baseline; ×2 damage
2×
Crit damage
Reduced to 1.5× in Gen 6
25%
Paralysis Speed
Quartered Speed
∞
Weather duration
Permanent until setter leaves (no rock items in Gen 3)
| Status | Effect | Notes |
|---|---|---|
| Paralysis | Speed × 0.25 + 25% chance to fail acting | Quartered Speed. |
| Burn | Physical Attack × 0.5 + 1/8 max HP per turn | Heavy DoT. |
| Freeze | Cannot act until thawed | 20% thaw per turn. Ice moves can freeze on secondary effect. |
| Sleep | Cannot act for 1–7 turns | Counter persists across switches in Gen 3 — reset rule arrived in Gen 5. Sleep Clause enforced. |
| Poison | 1/8 max HP per turn | Toxic doubles each turn up to 15/16. |
Notable abilities introduced
Gen 3 introduced abilities as a system. The list below covers the abilities with measurable competitive impact in ADV OU; many more exist but stay flavour.
Grants immunity to Ground-type moves. Distributed to Gengar, Claydol, Flygon, Mismagius(Gen 4), and many others. The franchise's most-used defensive ability for two decades.
Only super-effective moves can damage the user. Combined with Shedinja's 1 max HP, produces a Pokémon that is invulnerable to most attacks — but dies to a single hit of any super-effective type.
On switch-in, lowers the opposing Pokémon's Attack by one stage. Distributed broadly — Salamence, Gyarados, Hitmontop, Mawile (Gen 4) all carry it. Defines defensive switch-in pressure.
Raises the user's Speed by one stage at the end of each turn. Ninjaskwith Speed Boost + Baton Pass produced the era's defining setup-passing pattern.
Sets permanent Sun on switch-in. Restricted to Groudon in Gen 3 (later distributed to Ninetales via Dream World in Gen 5).
Sets permanent Rain. Restricted to Kyogre in Gen 3.
Sets permanent Sandstorm. The defining weather ability of ADV OU — every team had to plan around either using or counter-playing Tyranitar's sand.
The user cannot attack on alternate turns. Game Freak's balance lock on Slaking's 670 BST.
Opposing moves spend two PP per use against the holder. Defining ability for stall-leaning legendaries (Suicune, Lugia) and a niche mechanic for PP-stalling.
Grants immunity to sound-based moves (Hyper Voice, Roar, Perish Song). Niche but unique.
Items introduced
Gen 3 introduced Choice Band as the franchise's first Choice-locking offensive item. Berries (held items consumed under specific conditions) also originate here.
Choice BandPhysical wallbreakerBoosts the holder's Attack by 50% but locks them into one move. Defining offensive item of ADV OU — Tyranitar, Snorlax, Heracross all ran Band sets.
Salac BerrySpeed-pinch triggerRaises the holder's Speed by one stage when HP drops below 25%. Defining sweeper-enabler — Salamence Substitute + Salac Berry sets at 25% HP.
Petaya BerrySpA-pinch triggerRaises Special Attack by one stage at sub-25% HP. Special analogue of Salac.
Liechi BerryAtk-pinch triggerRaises Attack by one stage at sub-25% HP. Physical analogue of Salac.
Lum BerryStatus cleanseCures any status condition. Single-use. Defining defensive item for setup sweepers (Salamence Dragon Dance + Lum, Gyarados Dragon Dance + Lum).
Sitrus Berry (Gen 3 form)HP recoveryRestores 30 HP at sub-50% HP in Gen 3 (later changed to 25% max HP). Universal defensive item.
Leftovers (Gen 2 carryover)Passive recoveryPre-existing item; ADV cemented Leftovers as the default defensive item slot for almost every defensive Pokémon.
Mental HerbStatus protectionCures Attract / Encore / Taunt / Torment / Disable. Single-use. Niche but unique against move-locking statuses.
Signature moves introduced
Gen 3 introduced the era's defining offensive options — Earthquake distribution expanded, Hidden Power was rebuffed, and several setup moves arrived.
Existed in Gen 2 but Gen 3 standardised the IV-based type calculation. 70 BP fixed (versus IV-scaled in Gen 2). Universal special coverage option.
Two-turn delayed heal. Restores 50% of the user's max HP at the end of the turn after activation. Defining cleric-support move — Blissey + Wish + Soft-Boiled.
Fighting 75-BP physical attack that breaks Reflect / Light Screen on hit. Defining anti-screens option.
Status move that raises Special Attack and Special Defense by one stage each. The franchise's primary special setup move; defining for Suicune, Latias, Latios.
Dragon 80-BP physical attack. Pre-Gen 4 split, Dragon was special — Dragon Claw was a niche option until the split. In Gen 3 RSE, Dragon Claw stayed niche.
Status move that raises Attack and Speed by one stage each. Defining sweeper setup move — Salamence, Gyarados, Tyranitar all used Dragon Dance in ADV.
Normalphysical move that brings the target's HP down to the user's current HP. Defining FEAR strategy — Sturdy at 1 HP + Endeavor + Quick Attack.
Existed in Gen 2 but Gen 3 added stacking — up to three layers, dealing 12.5% / 16.67% / 25% per switch-in. Defining hazard for stall teams.
Fighting 85-BP physical attack that hits airborne targets. Niche but unique — pre-split, Fighting was already physical so Sky Uppercut was usable; mostly a Hariyama / Blaziken option.
Flying60-BP physical attack that never misses. The franchise's primary "always-hit" Flying option for fast attackers.
Competitive formats
Gen 3 is where Smogon's competitive format hierarchy was formalised. The OU / UU / Ubers structure, Sleep Clause, and Species Clause all date to ADV community decisions.
Tier 1
OU — OverUsed
6v6 Singles. Banlist included Mewtwo, Mew, Lugia, Ho-Oh, Kyogre, Groudon, Rayquaza, Deoxys forms, and Wobbuffet (Shadow Tag).
Restricted
Ubers
Hosted box legendaries and Pokémon banned for being uncompetitive in OU. Mewtwo + Kyogre + Groudon defined the era's top-tier offensive lineup.
Tier ladder
UU / NU
Lower Singles tiers populated by usage drops. UU had its own dedicated meta with Aerodactyl, Cloyster, Hitmontop, Kabutops.
Doubles
In-game Doubles
Doubles existed in-game from RSE onward. VGC formal play began in 2009 (Gen 4 era), so Doubles competitive in Gen 3 was Smogon-led.
Specialty
Smogon Tour
ADV is one of the franchise's most actively-played retro formats. Smogon Tour and SPL kept ADV OU active for two decades.
History
The original Smogon
Smogon itself was founded during the Gen 3 competitive era. The OU/UU/Ubers tier system and most of the canonical Singles rules trace to ADV-era community decisions.
Defining bans
ADV OU's banlist established the canonical pattern competitive Pokémon has used ever since: ban box legendaries, ban Pokémon whose stats outpace the format's answers, ban abilities (Shadow Tag) that distort the matchup space.
Notable Gen 3 OU bans
| Pokémon | Why it was banned |
|---|---|
| Mewtwo | 154 SpA + 130 Spe + universal coverage. Permanent Ubers from Gen 1 onward. |
| Lugia | 106/130/90/154/154/110 stat line + Multiscale-equivalent bulk + Recover. Permanent Ubers. |
| Ho-Oh | 106/130/90/110/154/90 + Sacred Fire (Fire-type, 50% burn chance). Permanent Ubers. |
| Kyogre | Drizzle + 150 SpA + Surf in rain. Permanent Ubers — set-piece of the rain offence. |
| Groudon | Drought + 150 Atk + Earthquake in sun. Permanent Ubers — physical analogue of Kyogre. |
| Rayquaza | Air Lock + 150 / 150 mixed offensive stats + Outrage / Dragon Claw / Earthquake. Permanent Ubers. |
| Deoxys-Speed | 180 base Speed + Stealth Rock setter (Gen 4+). Even in Gen 3, Deoxys forms were Ubers-only. |
| Deoxys-Attack | 180 / 180 mixed offensive stats. Permanent Ubers. |
| Wobbuffet | Shadow Tag + Counter / Mirror Coat. Banned for trapping pattern. |
| Slaking | 670 BST but Truant ability halved its action economy. Functionally OU-legal but rarely used due to the ability lock. |
| Snorlax | Suspect-tested for Choice Band wallbreaking; eventually retained in OU. |
| Latias | Suspect-tested in some sub-cycles; mostly stayed in OU. Latios saw similar treatment. |
Iconic Pokémon of the era
The Pokémon below shaped competitive Gen 3. Curated by competitive impact across the ADV OU meta — many of these stayed iconic for the next two decades through Smogon's ADV format.
Singles — ADV OU
Tyranitar
Sand setter · WallbreakerSand Stream — Choice Band — Rock Slide
Sand Stream + Choice Band + Rock Slide + Earthquake + Hidden Power Bug. The defining offensive engine of ADV OU; Sand Stream chip damage was the format's baseline pressure.
Salamence
Setup wallbreakerIntimidate — Dragon Dance — Earthquake
Dragon Dance + Earthquake + Hidden Power Flying / Rock Slide + Substitute. The era's archetypal physical setup sweeper.
Metagross
WallbreakerClear Body — Meteor Mash — Earthquake
Choice Band + Meteor Mash (Steel STAB before split + 20% Atk boost on hit) + Earthquake + Explosion. Defining physical wallbreaker.
Snorlax
Mixed wall · WallbreakerThick Fat — Rest — Curse
CurseLax (Curse + Rest + Body Slam + Earthquake) and Choice Band Snorlax both viable. The era's most flexible Normal-type, holding both defensive and offensive roles.
Skarmory
Hazard setterSturdy / Keen Eye — Spikes — Rest / Toxic
Spikes + Toxic + Drill Peck + Rest. The franchise's premier hazard setter; defined every defensive team of the era.
Blissey
Special wall · ClericNatural Cure — Wish — Soft-Boiled
Wish + Soft-Boiled + Toxic + Seismic Toss / Ice Beam. The franchise's premier special wall — 255/10/135 stat distribution favoured Special-side bulk overwhelmingly.
Suicune
Calm Mind winconPressure — Calm Mind — Surf
Calm Mind + Surf + Hidden Power Electric / Ice + Rest. The era's archetypal special setup wincon; CroCune (Calm Mind + Rest + Sleep Talk) defined late-game.
Heracross
WallbreakerGuts — Megahorn — Choice Band
Choice Band + Megahorn (120 BP, 85% accuracy) + Brick Break + Hidden Power Ghost / Rock. Bug/Fighting frame produced raw offensive output unmatched by other physicals.
Gengar
Special pivotLevitate — Thunderbolt — Ice Punch
Levitate Ground immunity + Thunderbolt + Ice Punch + Explosion. Pre-split, Ice Punch was special on Gengar (Ghost-type frame) — defining the Gen 3 Gengar offensive profile.
Aerodactyl
Lead · PursuitRock Head / Pressure — Rock Slide — Earthquake
Choice Band + Rock Slide + Earthquake + Hidden Power Flying. Defining lead and offensive Rock-type with 130 base Speed.
Where to go from here
The above is the static reference for Gen 3. The current state of any of its formats lives in the rest of Pokékipe.
- Live meta data — Pokémon stats, Team Builder, Timeline.
- Terminology — every term used above is defined in the Competitive Glossary.
- Workflow — the VGC Teambuilding and Core Mechanics guides cover the build process and underlying systems.
- Adjacent eras — Gen 4 — Diamond & Pearl covers the physical/special split and Stealth Rock that built on Gen 3's foundation. Gen 2 — Gold & Silver covers the Steel/Dark addition and held items that Gen 3 inherited.