Mass outbreak

Mass outbreaks (Japanese: 大量発生(たいりょうはっせい) mass outbreak), also known as swarms, Pokémon outbreaks, or wild outbreaks, are a feature introduced in Generation II that allows the player to catch Pokémon that are usually rare or otherwise unobtainable. They appear from Generations II to V, and in Pokémon Brilliant Diamond and Shining Pearl, Pokémon Legends: Arceus, and Pokémon Scarlet and Violet.

In the core series games

Generation II

In Generation II, if the player registered a certain Trainer in the Pokégear, that Trainer occasionally calls to tell the player that they saw or heard about a large number of Pokémon in a certain area. Until midnight (in-game time), the swarming Pokémon appear in the given area with much greater frequency than the usual 1%. Only one swarm can appear per day. The player can force a particular swarm to appear if a swarm has not already appeared that day by first deleting all possible phone numbers except the swarm Trainer's and then repeatedly toggling Daylight Savings Time by speaking with the player's Mom in New Bark Town. There is a 50% chance of triggering a phone call every time DST is changed.

Pokémon Gold, Silver, and Crystal

#	Pokémon		Location	Levels	Notifier	Games
0183		Marill	Mt. Mortar	13-15	Hiker Parry (Route 45)	G	S	C
0193		Yanma	Route 35	12-14	Bug Catcher Arnie (Route 35)	G	S	C
0206		Dunsparce	Dark Cave	2-4	Hiker Anthony (Route 33)	G	S	C
0209		Snubbull	Route 38	16	Schoolboy Chad (Route 38)	G	S	C
0211		Qwilfish	Route 32 Fishing	5/20/40 Old/Good/Super Rod	Fisher Ralph (Route 32)	G	S	C
0223		Remoraid	Route 44 Fishing	10/20/40 Old/Good/Super Rod	Fisher Wilton (Route 44)	G	S	C

Generation III

In Generation III, in addition to making rare Pokémon temporarily more common, this feature can be combined with record mixing to allow the player to catch Pokémon that cannot be caught at all normally. Pokémon encountered through mass outbreaks will also have a predefined set of moves.

After entering the Hall of Fame, every time the player finishes a battle, there is a ~0.5% (328/65536) chance that the game will generate an outbreak; this does not apply to link battles, e-Reader battles, the Safari Zone, or the Battle Tower/Frontier. After an outbreak is generated, the television program announcing it will appear the next day. Once the television program has been watched, the outbreak becomes active.^[1] Once outbreak has been activated, it will last until the end of the next day - during this time there's a 50% chance the game will generate the swarming Pokémon instead of using the usual encounter table (effectively halving the encounter rate for non-swarming Pokémon). However, seemingly due to an oversight, a particular savefile can only generate a mass outbreak only once without record mixing; that is, after record mixing, the game will be able to generate another outbreak on its own, after which the player has to do record mixing again, and so on.^[2]

The record mixing feature of Pokémon Ruby, Sapphire, and Emerald allows players to give an outbreak they've seen to other players, regardless of whether that outbreak would naturally occur in the player's game. The traded outbreaks will be announced on television in the following days after mixing records.

Pokémon Ruby, Sapphire, and Emerald

#	Pokémon		Location	Levels	Games			Moves
0283		Surskit	Route 102	3	R	S	E	Bubble Quick Attack — —
			Route 114	15	R	S	E	Bubble Quick Attack — —
			Route 117	15	R	S	E	Bubble Quick Attack — —
			Route 120	28	R	S	E	Bubble Quick Attack — —
0300		Skitty	Route 116	15	R	S	E	Growl Tackle — —
				8	R	S	E	Growl Tackle Tail Whip Attract
0273		Seedot	Route 102	3	R	S	E	Bide Harden Leech Seed —
			Route 117	13	R	S	E	Harden Growth Nature Power Leech Seed
			Route 120	25	R	S	E	Giga Drain Frustration SolarBeam Leech Seed
0274		Nuzleaf	Route 114	15	R	S	E	Harden Growth Nature Power Leech Seed

Generation IV

Mass outbreaks were largely expanded in Generation IV. Once the player attains the National Pokédex and has entered the Hall of Fame, a "swarm of Pokémon" will appear every day in a particular location, which changes the probability of finding the given Pokémon from 0% to 40%. Outbreaks last only one day and are random events. Information about mass outbreaks can be found in Sandgem Town by talking to Lucas/Dawn's sister or by watching the Sinnoh television ^DPPt, or by listening to Professor Oak's Pokémon Talk ^HGSS. Once an outbreak happens, the Pokémon can be found in the location's tall grass.

When players are active members of the same group, they will all experience the same outbreak on any given day. When a group is created, it is initialized with a random value. For every day that passes, this value is updated by seeding the RNG with the current day's value and generating a new value. On a given day, this value is used to determine which location has a mass outbreak.

Because of this mechanism, the sequence of swarming Pokémon is fixed for each group. So even if the date is edited, the next swarm will always be the same. If the DS clock is changed or a different DS is used, then the game will detect this and will not change the species swarming until 12:00 AM.

Pokémon Diamond, Pearl, and Platinum

Many of the Pokémon obtained through mass outbreaks are outside of the Sinnoh Pokédex, and are usually otherwise exclusive to other regions.

Due to the high encounter chances for Pokémon that appear during outbreaks, they make for longer and better chains when using the Poké Radar.

#	Pokémon		Location	Levels	Games
0016		Pidgey	Route 229	51	D	P	Pt
0081		Magnemite	Fuego Ironworks	28-29	D	P	Pt
0083		Farfetch'd	Route 221	28, 29Pt	D	P	Pt
0084		Doduo	Route 201	2	D	P	Pt
0096		Drowzee	Route 215	19Pt, 20, 21DP	D	P	Pt
0098		Krabby	Route 226	52	D	P	Pt
				48-49	D	P	Pt
0100		Voltorb	Route 218	28, 29Pt	D	P	Pt
0104		Cubone	Route 203	4	D	P	Pt
0108		Lickitung	Lake Valor	34, 36	D	P	Pt
0127		Pinsir	Route 229	48-49	D	P	Pt
0177		Natu	Route 224	53	D	P	Pt
				50	D	P	Pt
0206		Dunsparce	Route 208	16	D	P	Pt
				18	D	P	Pt
0209		Snubbull	Route 209	16	D	P	Pt
				18-19	D	P	Pt
0220		Swinub	Route 217	34	D	P	Pt
0222		Corsola	Route 230	50	D	P	Pt
				48	D	P	Pt
0225		Delibird	Route 216	32	D	P	Pt
			Route 217	32-33	D	P	Pt
0231		Phanpy	Route 207	5, 7Pt	D	P	Pt
0238		Smoochum	Lake Acuity	35	D	P	Pt
0246		Larvitar	Route 206	16	D	P	Pt
0263		Zigzagoon	Route 202	3	D	P	Pt
0283		Surskit	Lake Verity	2	D	P	Pt
0287		Slakoth	Eterna Forest	10, 11Pt	D	P	Pt
0296		Makuhita	Route 225	50-51	D	P	Pt
				48-49	D	P	Pt
0299		Nosepass	Route 206	14	D	P	Pt
0300		Skitty	Route 222	39Pt, 40	D	P	Pt
0309		Electrike	Valley Windworks	7	D	P	Pt
				9-10	D	P	Pt
0325		Spoink	Route 214	21Pt, 22, 23DP	D	P	Pt
0327		Spinda	Route 227	55	D	P	Pt
				53-54	D	P	Pt
0359		Absol	Route 213	20	D	P	Pt
0374		Beldum	Route 228	53	D	P	Pt
				51-52	D	P	Pt

Pokémon HeartGold and SoulSilver

The feature continues to appear in HeartGold and SoulSilver, where the wild Pokémon available include all those in original Generation II games, plus Ditto, Chansey, and Pokémon from Hoenn and Sinnoh. Information on swarms can now be found by listening to Professor Oak's Pokémon Talk on the Pokégear radio.

#	Pokémon		Location	Levels	Games
0113		Chansey	Route 13	23	HG	SS
0132		Ditto	Route 47	34	HG	SS
0183		Marill	Mt. Mortar	15	HG	SS
0193		Yanma	Route 35	12	HG	SS
0206		Dunsparce	Dark Cave	2-3	HG	SS
0209		Snubbull	Route 38	16	HG	SS
0211		Qwilfish	Route 32 Fishing	10/20/40 Old/Good/Super Rod	HG	SS
0223		Remoraid	Route 44 Fishing	10/20/40 Old/Good/Super Rod	HG	SS
0261		Poochyena	Route 1	2	HG	SS
0278		Wingull	Vermilion City Surfing	35	HG	SS
0280		Ralts	Route 34	10-11	HG	SS
0302		Sableye	Route 9	13-15	HG	SS
0303		Mawile	Route 9	13-15	HG	SS
0316		Gulpin	Route 3	5	HG	SS
0333		Swablu	Route 45	23	HG	SS
0340		Whiscash	Violet City Fishing	10/20/40 Old/Good/Super Rod	HG	SS
0343		Baltoy	Route 3	5	HG	SS
0366		Clamperl	Route 19 Surfing	35	HG	SS
0369		Relicanth	Route 12 Fishing	10/20/40 Old/Good/Super Rod	HG	SS
0370		Luvdisc	Route 27 Surfing	20	HG	SS
0401		Kricketot	Viridian Forest	3	HG	SS
0427		Buneary	Route 25	8-10	HG	SS

Generation V

The gates in Unova have a monitor inside that will alert the player to where an outbreak is taking place.

Unlike in previous games, mass outbreaks can be manipulated by soft resetting the game, but only if the player has not saved their game at all that day. When the game is restarted, there will be a different Pokémon swarming.

Pokémon Black and White

During winter, the monitor may occasionally not report on outbreaks, which is due to parts of Route 8, where Croagunk can be found, becoming frozen during winter and not allowing the Pokémon to be found there. All outbreaks in these games have a level range of 15-55.

#	Pokémon		Location	Levels	Games
0046		Paras	Route 11	15-55	B	W
0056		Mankey	Route 15	15-55	B	W
0083		Farfetch'd	Route 1	15-55	B	W
0084		Doduo	Route 12	15-55	B	W
0102		Exeggcute	Route 18	15-55	B	W
0161		Sentret	Route 7	15-55	B	W
0193		Yanma	Route 14	15-55	B	W
0204		Pineco	Route 16	15-55	B	W
0228		Houndour	Route 9	15-55	B	W
0235		Smeargle	Route 5	15-55	B	W
0236		Tyrogue	Route 10	15-55	B	W
0261		Poochyena	Route 9	15-55	B	W
0285		Shroomish	Route 11	15-55	B	W
0311		Plusle	Route 6	15-55	B	W
0312		Minun	Route 6	15-55	B	W
0313		Volbeat	Route 3	15-55	B	W
0314		Illumise	Route 3	15-55	B	W
0353		Shuppet	Route 13	15-55	B	W
0360		Wynaut	Route 2	15-55	B	W
0449		Hippopotas	Route 4	15-55	B	W
0453		Croagunk*	Route 8	15-55	B	W

Pokémon Black 2 and White 2

All outbreaks in these games have a level range of 40-55 and an encounter rate of 40%.

#	Pokémon		Location	Levels	Games
0022		Fearow	Route 15	40-55	B2	W2
0079		Slowpoke	Abundant Shrine	40-55	B2	W2
0083		Farfetch'd	Route 1	40-55	B2	W2
0084		Doduo	Route 12	40-55	B2	W2
0097		Hypno	Dreamyard	40-55	B2	W2
0122		Mr. Mime	Route 20	40-55	B2	W2
0162		Furret	Route 7	40-55	B2	W2
0166		Ledian	Route 22	40-55	B2	W2
0168		Ariados	Route 22	40-55	B2	W2
0177		Natu	Route 5	40-55	B2	W2
0185		Sudowoodo	Route 20	40-55	B2	W2
0187		Hoppip	Route 18	40-55	B2	W2
0195		Quagsire	Route 8	40-55	B2	W2
0204		Pineco	Route 16	40-55	B2	W2
0277		Swellow	Route 13	40-55	B2	W2
0284		Masquerain	Route 11	40-55	B2	W2
0311		Plusle	Route 6	40-55	B2	W2
0312		Minun	Route 6	40-55	B2	W2
0313		Volbeat	Route 3	40-55	B2	W2
0314		Illumise	Route 3	40-55	B2	W2
0317		Swalot	Route 9	40-55	B2	W2
0332		Cacturne	Reversal Mountain	40-55	B2	W2
0450		Hippowdon	Desert Resort	40-55	B2	W2

Generation VIII

Pokémon Brilliant Diamond and Shining Pearl

Pokémon outbreaks return for the first time since Black 2 and White 2, featuring the same encounters as in Diamond and Pearl.

Unlike in Generation IV, the Pokémon featured in the mass outbreaks appear visibly in the tall grass, popping in and out en masse. These Pokémon cannot be interacted with, however, as they vanish back into the grass if the player approaches them, and the means of encountering them remains the same as in the original games. The information about a current outbreak is found in the pause menu, but Lucas/Dawn's little sister can also tell the player what outbreak is currently active.

#	Pokémon		Location	Levels
0016		Pidgey	Route 229	51
0081		Magnemite	Fuego Ironworks	28-29
0083		Farfetch'd	Route 221	28
0084		Doduo	Route 201	2
0096		Drowzee	Route 215	20-21
0098		Krabby	Route 226	52
0100		Voltorb	Route 218	28
0104		Cubone	Route 203	4
0108		Lickitung	Lake Valor	34, 36
0177		Natu	Route 224	53
0206		Dunsparce	Route 208	16
0209		Snubbull	Route 209	16
0220		Swinub	Route 217	34
0222		Corsola	Route 230	50
0225		Delibird	Route 216	32
0231		Phanpy	Route 207	5
0238		Smoochum	Lake Acuity	35
0263		Zigzagoon	Route 202	3
0283		Surskit	Lake Verity	2
0287		Slakoth	Eterna Forest	10
0296		Makuhita	Route 225	50-51
0299		Nosepass	Route 206	14
0300		Skitty	Route 222	40
0309		Electrike	Valley Windworks	7
0325		Spoink	Route 214	22-23
0327		Spinda	Route 227	55
0359		Absol	Route 213	20
0374		Beldum	Route 228	53

Pokémon Legends: Arceus

This section is incomplete. Please feel free to edit this section to add missing information and complete it. Reason: Update and double check Massive Mass Outbreak mechanics Example 1, Example 2

Pokémon Legends: Arceus has two types of outbreaks: mass outbreaks and massive mass outbreaks (Japanese: 大大大発生). Prior to v1.1.0, only mass outbreaks were available. Outbreaks can be seen on the Hisui map when choosing where to travel. They are indicated by a circle with the headshot of a Pokémon (for a mass outbreak) or a question mark (for a massive mass outbreak) over an area.

In a mass outbreak, many Pokémon—from the same evolutionary line—spawn in a single location. Only a single mass outbreak can be active in an area at a time, but multiple areas can have a mass outbreak. In total, a mass outbreak will spawn 10 to 15 Pokémon before ending, with 4 Pokémon being spawned at any given time. A new mass outbreak may activate any time the player returns to Jubilife Village, at a 20% chance per area; when leaving the village, there is also a 20% chance an outbreak will deactivate per area, except for the area the player is traveling to.^[3] Additionally, the contents of the mass outbreak are determined upon traveling to that region, rather than when the Pokémon spawn.

In a massive mass outbreak, many mass outbreaks (11 to 15) occur in an area. Massive mass outbreaks draw on their own set of mass outbreaks that has some overlap with species seen in normal mass outbreaks, but also many unique species. Initially, each outbreak location is only visible as a question mark; they can be revealed by visiting each location or by giving 5 Aguav Berries to Mai's Munchlax at any base camp. When revealed, some locations may be highlighted by a yellow circle, with either a Berry or a star marking it. A star indicates that that location has extra waves to its outbreak. A Berry indicates that each time a Pokémon from that outbreak is defeated or caught, the player will receive one Aguav Berry. There may be zero or multiple locations with a Berry or a star (but never with both). Each outbreak location has a 10% chance to be a Berry location, but only if it is not a starred location.

If a location in a massive mass outbreak initially has a star, then it will spawn Pokémon in two waves. After clearing all Pokémon in the first wave, a second wave will spawn with Pokémon that are either evolved versions of the original wave (with a small chance for any to be an alpha Pokémon), one of the species from the first wave but always as alpha Pokémon, or both (i.e. evolved versions of the original wave, all of which are alpha Pokémon). If the second wave consists of evolved versions, the map icon for the location will change to reflect this; either way, however, the star will remain present on the map during the second wave. A cleared location that does not have a Berry or star has a chance to nonetheless produce a second wave as though it did have a star. In either case, Pokémon found in a second wave will always have at least three perfect individual values of 31, whether it is an alpha specimen or not.

All Pokémon found in massive mass outbreaks will be at least level 60, unless the Pokémon's species is one that evolves starting at a specific level, in which case non-alphas of that species will be found 1-3 levels under the level required for Evolution.

Massive mass outbreaks last for a limited time after the player arrives at the containing area. They may start with 7, 9, or 11 minutes of time. As the time wanes, the game will display a warning at certain intervals.

Pokémon in outbreaks have increased chances of being Shiny. For example, with the Shiny Charm (and therefore all research task bonuses), wild Pokémon have a Shiny rate of approximately 0.17%, Pokémon in a mass outbreak have a rate of 0.78%, and Pokémon in a massive mass outbreak have a rate of 0.46%. For full details, see Shiny Pokémon → Pokémon Legends: Arceus.

The Pokémon that can appear in each area in outbreaks are as follows (mass outbreak and massive mass outbreak are abbreviated as M.O. and M.M.O., respectively, Pokémon marked with an * only spawn in massive mass outbreaks of their pre-Evolution or from a second wave):

The majority of Pokémon species in Hisui can have a mass outbreak in the area(s) where they normally spawn in the overworld, with the exception of four categories:

• Pokémon species that never appear in the overworld (Legendary and Mythical Pokémon, Sneasler, Overqwil, Hisuian Electrode, etc.);
• Pokémon species that appear in the overworld exclusively as fixed alphas (such as Infernape, Torterra, Empoleon, Rapidash, Dusknoir, etc.);
• Pokémon species that appear in the overworld exclusively in space-time distortions (first partner Pokémon lines, Eeveelutions, Porygon line, Cranidos and Shieldon lines, etc.);
• Pokémon species that exclusively appear flying in the overworld (Togetic, Togekiss, Hisuian Braviary, Magnezone, Crobat).

Additionally, Pokémon that normally spawn only during the day or at night in the overworld can have an outbreak at any time of day, such as Drifloon or Zubat being able to have an outbreak in the day despite normally only appearing at night.

Two Pokémon have additional requirements for appearing in massive mass outbreaks:

• Spiritomb will not appear until all 108 Wisps are obtained and Request 22: "Eerie Apparitions in the Night" is complete.
• Unown will not appear until all 28 forms have been found and cataloged in the Pokédex's Unown Research Notes.

#	Pokémon		Obsidian Fieldlands		Crimson Mirelands		Cobalt Coastlands		Coronet Highlands		Alabaster Icelands
			M.O.	M.M.O.	M.O.	M.M.O.	M.O.	M.M.O.	M.O.	M.M.O.	M.O.	M.M.O.
0025		Pikachu	✓	✓
0026		Raichu		✓*
0035		Clefairy						✓*	✓	✓
0036		Clefable								✓*
0037		Vulpix					✓	✓				✓
0038		Ninetales						✓*				✓*
0041		Zubat	✓	✓					✓
0042		Golbat	✓	✓					✓
0046		Paras	✓	✓	✓	✓
0047		Parasect	✓	✓	✓	✓
0054		Psyduck	✓		✓	✓		✓
0055		Golduck	✓		✓	✓		✓*
0058		Growlithe					✓	✓
0059		Arcanine						✓*
0063		Abra	✓	✓								✓
0064		Kadabra	✓	✓								✓
0065		Alakazam		✓*								✓*
0066		Machop					✓	✓			✓	✓
0067		Machoke					✓	✓			✓	✓
0068		Machamp						✓*				✓*
0072		Tentacool					✓	✓
0073		Tentacruel					✓	✓*
0074		Geodude		✓	✓			✓	✓	✓
0075		Graveler		✓	✓			✓	✓	✓
0076		Golem		✓*				✓*		✓*
0077		Ponyta	✓	✓						✓
0078		Rapidash	✓	✓*						✓*
0092		Gastly			✓	✓				✓	✓	✓
0093		Haunter			✓	✓				✓	✓	✓
0094		Gengar				✓*				✓*		✓*
0095		Onix				✓		✓	✓
0100		Voltorb							✓	✓
0101		Electrode								✓*
0108		Lickitung			✓	✓					✓	✓
0111		Rhyhorn			✓	✓			✓	✓
0112		Rhydon			✓	✓			✓	✓
0113		Chansey	✓		✓		✓	✓	✓		✓
0114		Tangela			✓	✓	✓
0122		Mr. Mime	✓	✓*						✓*
0123		Scyther	✓	✓					✓
0125		Electabuzz							✓	✓
0126		Magmar					✓	✓				✓*
0129		Magikarp	✓					✓	✓
0130		Gyarados	✓					✓*	✓
0133		Eevee	✓								✓
0143		Snorlax		✓*
0155		Cyndaquil				✓
0156		Quilava				✓
0157		Typhlosion				✓*
0169		Crobat		✓*
0172		Pichu	✓	✓
0173		Cleffa						✓	✓	✓
0175		Togepi			✓		✓	✓
0176		Togetic						✓
0185		Sudowoodo			✓	✓*			✓
0190		Aipom					✓	✓			✓	✓
0193		Yanma			✓	✓			✓	✓
0198		Murkrow			✓	✓
0200		Misdreavus							✓	✓	✓	✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0201		Unown				✓
0207		Gligar							✓	✓	✓
0208		Steelix				✓*		✓*
0211		Qwilfish	✓				✓	✓
0214		Heracross							✓	✓
0215		Sneasel							✓	✓	✓
0216		Teddiursa			✓	✓			✓
0217		Ursaring			✓	✓			✓
0220		Swinub				✓					✓	✓
0221		Piloswine				✓*					✓	✓
0223		Remoraid					✓
0224		Octillery					✓
0226		Mantine					✓	✓*
0234		Stantler	✓	✓							✓
0239		Elekid							✓	✓
0240		Magby					✓	✓				✓
0242		Blissey						✓*
0265		Wurmple	✓	✓
0266		Silcoon	✓	✓
0267		Beautifly	✓	✓*
0268		Cascoon	✓	✓
0269		Dustox	✓	✓*
0280		Ralts									✓	✓
0281		Kirlia									✓	✓
0282		Gardevoir									✓	✓*
0299		Nosepass							✓	✓
0315		Roselia			✓	✓			✓
0339		Barboach			✓
0340		Whiscash			✓
0355		Duskull					✓			✓	✓	✓
0356		Dusclops					✓			✓	✓	✓
0358		Chimecho							✓	✓*	✓
0361		Snorunt									✓	✓
0362		Glalie									✓	✓*
0363		Spheal		✓			✓	✓
0364		Sealeo		✓*			✓	✓
0365		Walrein					✓	✓*
0387		Turtwig			✓	✓
0388		Grotle			✓	✓
0389		Torterra				✓*
0390		Chimchar	✓	✓
0391		Monferno	✓	✓
0392		Infernape		✓*
0393		Piplup					✓	✓
0394		Prinplup					✓	✓
0395		Empoleon						✓*
0396		Starly	✓	✓			✓	✓
0397		Staravia	✓	✓			✓	✓
0398		Staraptor	✓	✓*			✓	✓*
0399		Bidoof	✓	✓							✓	✓
0400		Bibarel	✓	✓*							✓	✓*
0401		Kricketot	✓	✓	✓	✓
0402		Kricketune	✓	✓*	✓	✓*
0403		Shinx	✓	✓					✓	✓
0404		Luxio	✓	✓					✓	✓
0405		Luxray	✓	✓*					✓	✓*
0406		Budew			✓	✓			✓
0407		Roserade				✓*
0415		Combee	✓		✓
0417		Pachirisu			✓	✓						✓
0418		Buizel	✓	✓			✓
0419		Floatzel	✓	✓*			✓
0420		Cherubi	✓
0422		Shellos	✓	✓
0422		Shellos					✓	✓
0423		Gastrodon	✓	✓*
0423		Gastrodon					✓	✓*
0424		Ambipom					✓	✓*			✓	✓*
0425		Drifloon		✓			✓				✓	✓
0426		Drifblim		✓*			✓				✓	✓*
0427		Buneary	✓	✓								✓
0428		Lopunny		✓*								✓*
0429		Mismagius								✓*		✓*
0430		Honchkrow				✓*
0431		Glameow					✓	✓				✓
0432		Purugly					✓	✓*				✓*
0433		Chingling							✓	✓	✓
0434		Stunky			✓	✓			✓	✓
0435		Skuntank			✓	✓*			✓	✓*
0436		Bronzor				✓			✓	✓	✓	✓
0437		Bronzong				✓*			✓	✓*	✓	✓*
0438		Bonsly			✓	✓			✓
0439		Mime Jr.	✓	✓						✓
0440		Happiny	✓		✓		✓	✓	✓		✓
0441		Chatot		✓			✓	✓
0442		Spiritomb				✓
0443		Gible							✓	✓	✓
0444		Gabite							✓	✓	✓
0445		Garchomp								✓*
0446		Munchlax		✓							✓
0447		Riolu						✓			✓	✓
0448		Lucario						✓*				✓*
0449		Hippopotas			✓	✓			✓	✓
0450		Hippowdon			✓	✓*			✓	✓*
0451		Skorupi				✓	✓	✓
0452		Drapion				✓*	✓	✓*
0453		Croagunk			✓	✓			✓
0454		Toxicroak			✓	✓*			✓
0455		Carnivine			✓	✓
0456		Finneon					✓	✓
0457		Lumineon					✓	✓*
0458		Mantyke					✓	✓
0459		Snover								✓	✓	✓
0460		Abomasnow								✓*	✓	✓*
0463		Lickilicky			✓	✓*						✓*
0464		Rhyperior				✓*				✓*
0465		Tangrowth			✓	✓*	✓
0466		Electivire								✓*
0467		Magmortar						✓*
0468		Togekiss						✓*
0469		Yanmega			✓	✓*			✓	✓*
0472		Gliscor								✓*
0473		Mamoswine									✓	✓*
0475		Gallade										✓*
0476		Probopass								✓*
0477		Dusknoir								✓*		✓*
0478		Froslass										✓*
0479		Rotom							✓	✓
0501		Oshawott										✓
0502		Dewott										✓
0503		Samurott										✓*
0548		Petilil			✓	✓
0549		Lilligant				✓*
0550		Basculin					✓	✓			✓
0570		Zorua		✓							✓	✓
0571		Zoroark		✓*							✓	✓*
0627		Rufflet									✓	✓
0628		Braviary									✓	✓*
0704		Goomy			✓	✓			✓
0705		Sliggoo			✓	✓			✓
0706		Goodra				✓*
0712		Bergmite									✓	✓
0713		Avalugg									✓	✓*
0722		Rowlet								✓
0723		Dartrix								✓
0724		Decidueye								✓*
0899		Wyrdeer		✓*
0900		Kleavor		✓*
0901		Ursaluna				✓*
0902		Basculegion						✓*
0902		Basculegion						✓*
0903		Sneasler								✓*
0904		Overqwil						✓*

Generation IX

Pokémon Scarlet and Violet

This section is incomplete. Please feel free to edit this section to add missing information and complete it. Reason: Add all mechanics relating to mass outbreaks in Generation IX, including the list of possible Pokémon, glitched species, their areas, and how mark bonuses are handled for specific Poké Portal News event Outbreaks.

Mass outbreaks are the same as in the previous generations.

The Pokémon that appears as part of the outbreak will be featured in the world map, and the chances of encountering this Pokémon are significantly increased over other Pokémon in the area. The Pokémon selected for the outbreak will be confined to a limited area, which is further influenced by the biome they appear in.

When fighting the Pokémon through manual or autobattling, the Pokémon stock will continually decrease as the game respawns them from battling. This number does not decrease if the player forcibly despawns them through picnics or leaving the area, however any target Pokémon defeated in the outbreak will be counted, including through saving and exiting the game. The game will warn the player of the outbreak subsiding after defeating a set amount of Pokémon two times; the third message will inform the player that the outbreak has ended.

While outbreaks are randomly determined, players can influence the Pokémon that appears from the outbreak if they have eaten a sandwich with Encounter Power. For example, if a player wished to target Sylveon outbreaks, they would consume a sandwich that provides Fairy Encounter, increasing the chance of a Fairy-type outbreak.

Outbreaks are commonly targeted by Shiny Pokémon hunters, as it allows the player to easily look for that Pokémon type without using less efficient methods as each area contains a large pool of Pokémon to spawn. Players can further influence the rate of Shiny Pokémon appearing in the outbreak by defeating the said Pokémon; after defeating at least 30 of them, a second roll is added, effectively halving the drop rate from 1/4096 to 1/2408.25. After defeating at least 60 of the Pokémon, another roll is added to reduce it from 1/2408.25 to 1/1365.67. This roll further stacks with the Sparkling Power provided by sandwiches; with 60+ Pokémon defeated and level 3 Sparkling Power, the player has a 1/683.08 chance of running into a Shiny Pokémon in the outbreak. The Shiny Charm further stacks on this bonus, effectively increasing the encounter rate of a Shiny Pokémon to 1/512 when all conditions are met.

As part of events, some Pokémon have been selected to be part of a mass outbreak and their Shiny encounter chance increased.

Outbreaks will persist until either manually cleared or upon hitting 12 A.M. in real time.

Paldea

Main article: List of mass outbreaks in Paldea

Kitakami

Main article: List of mass outbreaks in Kitakami

Terarium

Main article: List of mass outbreaks in the Terarium

In the spin-off games

Pokémon Conquest

Main article: Kingdom event → Pokémon swarms

In Pokémon Conquest, there is a small chance that a rare species of Pokémon will swarm a single wild Pokémon kingdom location, for one in-game month. Each kingdom has one species of Pokémon that can potentially appear as a swarm, with the kingdom's type matching one of the Pokémon's types. The species of Pokémon that appear through naturally-spawning swarms are normally only available through swarms.

Eevee also appears through swarms, but more-frequently, and with slightly-different rules: the Hero/Heroine must be in the player's army, and must not currently be linked to an Eevee. While these conditions are met, swarms of Eevee can appear in Park locations, which are in the following kingdoms:

• Pugilis
• Terrera
• Cragspur
• Viperia
• Valora

Alternatively, the player can spawn a swarm of a specific Pokémon on demand through using passwords, though with restrictions on which Pokémon can be summoned and on the total amount of passwords that can be used.

Pokémon		Kingdom(s)
	Audino	Aurora
	Pansear	Ignis
	Pansage	Greenleaf
	Panpour	Fontaine
	Croagunk	Pugilis, Viperia
	Emolga	Violight
	Anorith	Chrysalia, Cragspur
	Gible	Terrera, Dragnor
	Beldum	Illusio, Valora
	Sneasel	Yaksha, Nixtorm
	Drifloon	Avia, Spectra

In animation

Pokémon the Series

Pokémon the Series: Gold and Silver

Prior to the events of The Dunsparce Deception, a mass outbreak of Dunsparce appeared in a town in Johto, which resulted in all of the children in the area catching one, except for a boy named Bucky, who was out of town when the outbreak occurred.

Pokémon the Series: XY

In The Clumsy Crier Quiets the Chaos!, Nurse Joy told Ash and his friends a tale of how a mass outbreak of rampaging Flygon had been once calmed down by a lone Wigglytuff, leading to Wigglytuff becoming Pokémon Center assistants all across Kalos.

Pokémon Journeys: The Series

In Ivysaur's Mysterious Tower!, Vermilion City was the site of a mass outbreak of Bulbasaur and Ivysaur. Ash and Goh learned that the former grassland, now the site of a new Gym, was the ideal site for the Bulbasaur line to absorb the solar energy and wind needed to undergo Evolution.

In Gotta Catch a What?!, Ash and Goh ventured into the mountains to discover a reported Pikachu outbreak. They learned that Pikachu had gathered because the area was rich in Thunder Stones, helping the Pikachu, including Goh's newly caught one, evolve into Raichu en masse.

In Trials of a Budding Master!, Goh learned of a mass outbreak of Geodude at the Rock Tunnel. After arriving there with Ash, he almost immediately found one and caught it.

Pokémon: Discover Paldea

In A Flock of Flamigo, a group of four students find a mass outbreak of Flamigo in South Province (Area Four). They each try to capture a different Flamigo; one of them succeeds in catching a normal Flamigo, while another succeeds in catching a Shiny Flamigo.

Trivia

• In-universe, the term massive mass outbreak was coined by Cyllene.^[4]

In other languages

Related articles

• Dual-slot mode
• Poké Radar

References

This game mechanic article is part of Project Games, a Bulbapedia project that aims to write comprehensive articles on the Pokémon games.