Emerald Legacy Egg Groups & Breeding Chart: All 389 Pokemon

Two Pokemon can breed if they share an egg group and aren't both male or both female. That's the whole rule, and 90% of breeding frustration comes from missing it -- usually because the two Pokemon you picked don't share a group, or because one of them is in Undiscovered and simply never breeds at all.

Find both sides in the tables below. The group index first, then every species.

The groups and who's in them

Egg group	Species	Members
Monster	49	Bulbasaur, Ivysaur, Venusaur, Charmander, Charmeleon, Charizard, Squirtle, Wartortle, Blastoise, Nidoran♀, Nidoran♂, Nidorino, Nidoking, Slowpoke, Slowbro, Cubone, Marowak, Lickitung, Rhyhorn, Rhydon, Kangaskhan, Lapras, Snorlax, Chikorita, Bayleef, Meganium, Totodile, Croconaw, Feraligatr, Mareep, Flaaffy, Ampharos, Slowking, Larvitar, Pupitar, Tyranitar, Treecko, Grovyle, Sceptile, Mudkip, Marsh…
Water 1	58	Squirtle, Wartortle, Blastoise, Psyduck, Golduck, Poliwag, Poliwhirl, Poliwrath, Slowpoke, Slowbro, Seel, Dewgong, Horsea, Seadra, Lapras, Omanyte, Omastar, Kabuto, Kabutops, Dratini, Dragonair, Dragonite, Totodile, Croconaw, Feraligatr, Marill, Azumarill, Politoed, Wooper, Quagsire, Slowking, Corsola, Remoraid, Octillery, Delibird, Mantine, Kingdra, Mudkip, Marshtomp, Swampert, Lotad, Lombre, Lud…
Bug	37	Caterpie, Metapod, Butterfree, Weedle, Kakuna, Beedrill, Paras, Parasect, Venonat, Venomoth, Scyther, Pinsir, Ledyba, Ledian, Spinarak, Ariados, Yanma, Pineco, Forretress, Gligar, Scizor, Shuckle, Heracross, Wurmple, Silcoon, Beautifly, Cascoon, Dustox, Nincada, Ninjask, Surskit, Masquerain, Trapinch, Vibrava, Flygon, Volbeat, Illumise
Flying	25	Pidgey, Pidgeotto, Pidgeot, Spearow, Fearow, Zubat, Golbat, Farfetch'd, Doduo, Dodrio, Aerodactyl, Hoothoot, Noctowl, Crobat, Togetic, Natu, Xatu, Murkrow, Skarmory, Taillow, Swellow, Wingull, Pelipper, Swablu, Altaria
Field	102	Rattata, Raticate, Ekans, Arbok, Pikachu, Raichu, Sandshrew, Sandslash, Nidoran♀, Nidoran♂, Nidorino, Nidoking, Vulpix, Ninetales, Diglett, Dugtrio, Meowth, Persian, Psyduck, Golduck, Mankey, Primeape, Growlithe, Arcanine, Ponyta, Rapidash, Farfetch'd, Seel, Dewgong, Rhyhorn, Rhydon, Tauros, Eevee, Vaporeon, Jolteon, Flareon, Cyndaquil, Quilava, Typhlosion, Sentret, Furret, Mareep, Flaaffy, Amphar…
Fairy	27	Pikachu, Raichu, Clefairy, Clefable, Jigglypuff, Wigglytuff, Chansey, Togetic, Marill, Azumarill, Hoppip, Skiploom, Jumpluff, Snubbull, Granbull, Blissey, Shroomish, Breloom, Skitty, Delcatty, Snorunt, Glalie, Plusle, Minun, Mawile, Roselia, Castform
Grass	35	Bulbasaur, Ivysaur, Venusaur, Oddish, Gloom, Vileplume, Paras, Parasect, Bellsprout, Weepinbell, Victreebel, Exeggcute, Exeggutor, Tangela, Chikorita, Bayleef, Meganium, Bellossom, Hoppip, Skiploom, Jumpluff, Sunkern, Sunflora, Lotad, Lombre, Ludicolo, Seedot, Nuzleaf, Shiftry, Shroomish, Breloom, Cacnea, Cacturne, Roselia, Tropius
Human-Like	25	Abra, Kadabra, Alakazam, Machop, Machoke, Machamp, Drowzee, Hypno, Hitmonlee, Hitmonchan, Mr. Mime, Jynx, Electabuzz, Magmar, Hitmontop, Spinda, Sableye, Makuhita, Hariyama, Cacnea, Cacturne, Meditite, Medicham, Volbeat, Illumise
Water 3	19	Tentacool, Tentacruel, Shellder, Cloyster, Krabby, Kingler, Staryu, Starmie, Omanyte, Omastar, Kabuto, Kabutops, Corsola, Corphish, Crawdaunt, Lileep, Cradily, Anorith, Armaldo
Mineral	23	Geodude, Graveler, Golem, Magnemite, Magneton, Onix, Voltorb, Electrode, Porygon, Sudowoodo, Steelix, Porygon2, Shedinja, Baltoy, Claydol, Nosepass, Snorunt, Glalie, Lunatone, Solrock, Beldum, Metang, Metagross
Amorphous	22	Grimer, Muk, Gastly, Haunter, Gengar, Koffing, Weezing, Misdreavus, Wobbuffet, Slugma, Magcargo, Duskull, Dusclops, Gulpin, Swalot, Shuppet, Banette, Castform, Ralts, Kirlia, Gardevoir, Chimecho
Water 2	17	Goldeen, Seaking, Magikarp, Gyarados, Chinchou, Lanturn, Qwilfish, Remoraid, Octillery, Wailmer, Wailord, Barboach, Whiscash, Luvdisc, Carvanha, Sharpedo, Relicanth
Ditto	1	Ditto
Dragon	24	Charmander, Charmeleon, Charizard, Ekans, Arbok, Horsea, Seadra, Magikarp, Gyarados, Dratini, Dragonair, Dragonite, Kingdra, Treecko, Grovyle, Sceptile, Feebas, Milotic, Swablu, Altaria, Seviper, Bagon, Shelgon, Salamence
Undiscovered	37	Nidorina, Nidoqueen, Articuno, Zapdos, Moltres, Mewtwo, Mew, Pichu, Cleffa, Igglybuff, Togepi, Unown, Tyrogue, Smoochum, Elekid, Magby, Raikou, Entei, Suicune, Lugia, Ho-Oh, Celebi, Azurill, Wynaut, Regirock, Regice, Registeel, Kyogre, Groudon, Rayquaza, Latias, Latios, Jirachi, Deoxys, Deoxys, Deoxys, Deoxys

Field is the biggest group in the ROM at 102 species, which is why it's the group most breeding projects end up using.

The two rules people trip over

Undiscovered is a hard no. 34 species can never breed, in any pairing, including with Ditto: Nidorina, Nidoqueen, Articuno, Zapdos, Moltres, Mewtwo, Mew, Pichu, Cleffa, Igglybuff, Togepi, Unown, Tyrogue, Smoochum, Elekid, Magby, plus the rest of the babies and legendaries. If you want a baby form, you catch it -- you don't breed for it.

Ditto breeds with anything breedable. It sits in its own group in the data and pairs with any non-Undiscovered Pokemon regardless of what group that Pokemon is in. That makes it the only answer for genderless species -- Magnemite, Voltorb, Staryu, Porygon and the rest -- which otherwise can't breed at all, since pairing them needs a partner they share a group with and a gender they don't have.

Every Pokemon's egg group and gender

Pokemon	Egg groups	Gender
Abra	Human-Like	25% female
Absol	Field	50% female
Aerodactyl	Flying	12.5% female
Aggron	Monster	50% female
Aipom	Field	50% female
Alakazam	Human-Like	25% female
Altaria	Flying, Dragon	50% female
Ampharos	Monster, Field	50% female
Anorith	Water 3	12.5% female
Arbok	Field, Dragon	50% female
Arcanine	Field	25% female
Ariados	Bug	50% female
Armaldo	Water 3	12.5% female
Aron	Monster	50% female
Articuno	Undiscovered	genderless
Azumarill	Water 1, Fairy	50% female
Azurill	Undiscovered	75% female
Bagon	Dragon	50% female
Baltoy	Mineral	genderless
Banette	Amorphous	50% female
Barboach	Water 2	50% female
Bayleef	Monster, Grass	12.5% female
Beautifly	Bug	50% female
Beedrill	Bug	50% female
Beldum	Mineral	genderless
Bellossom	Grass	50% female
Bellsprout	Grass	50% female
Blastoise	Monster, Water 1	12.5% female
Blaziken	Field	12.5% female
Blissey	Fairy	always female
Breloom	Fairy, Grass	50% female
Bulbasaur	Monster, Grass	12.5% female
Butterfree	Bug	50% female
Cacnea	Grass, Human-Like	50% female
Cacturne	Grass, Human-Like	50% female
Camerupt	Field	50% female
Carvanha	Water 2	50% female
Cascoon	Bug	50% female
Castform	Fairy, Amorphous	50% female
Caterpie	Bug	50% female
Celebi	Undiscovered	genderless
Chansey	Fairy	always female
Charizard	Monster, Dragon	12.5% female
Charmander	Monster, Dragon	12.5% female
Charmeleon	Monster, Dragon	12.5% female
Chikorita	Monster, Grass	12.5% female
Chimecho	Amorphous	50% female
Chinchou	Water 2	50% female
Clamperl	Water 1	50% female
Claydol	Mineral	genderless
Clefable	Fairy	75% female
Clefairy	Fairy	75% female
Cleffa	Undiscovered	75% female
Cloyster	Water 3	50% female
Combusken	Field	12.5% female
Corphish	Water 1, Water 3	50% female
Corsola	Water 1, Water 3	75% female
Cradily	Water 3	12.5% female
Crawdaunt	Water 1, Water 3	50% female
Crobat	Flying	50% female
Croconaw	Monster, Water 1	12.5% female
Cubone	Monster	50% female
Cyndaquil	Field	12.5% female
Delcatty	Field, Fairy	75% female
Delibird	Water 1, Field	50% female
Deoxys	Undiscovered	genderless
Deoxys	Undiscovered	genderless
Deoxys	Undiscovered	genderless
Deoxys	Undiscovered	genderless
Dewgong	Water 1, Field	50% female
Diglett	Field	50% female
Ditto	Ditto	genderless
Dodrio	Flying	50% female
Doduo	Flying	50% female
Donphan	Field	50% female
Dragonair	Water 1, Dragon	50% female
Dragonite	Water 1, Dragon	50% female
Dratini	Water 1, Dragon	50% female
Drowzee	Human-Like	50% female
Dugtrio	Field	50% female
Dunsparce	Field	50% female
Dusclops	Amorphous	50% female
Duskull	Amorphous	50% female
Dustox	Bug	50% female
Eevee	Field	12.5% female
Ekans	Field, Dragon	50% female
Electabuzz	Human-Like	25% female
Electrike	Field	50% female
Electrode	Mineral	genderless
Elekid	Undiscovered	25% female
Entei	Undiscovered	genderless
Espeon	Field	12.5% female
Exeggcute	Grass	50% female
Exeggutor	Grass	50% female
Exploud	Monster, Field	50% female
Farfetch'd	Flying, Field	50% female
Fearow	Flying	50% female
Feebas	Water 1, Dragon	50% female
Feraligatr	Monster, Water 1	12.5% female
Flaaffy	Monster, Field	50% female
Flareon	Field	12.5% female
Flygon	Bug	50% female
Forretress	Bug	50% female
Furret	Field	50% female
Gardevoir	Amorphous	50% female
Gastly	Amorphous	50% female
Gengar	Amorphous	50% female
Geodude	Mineral	50% female
Girafarig	Field	50% female
Glalie	Fairy, Mineral	50% female
Gligar	Bug	50% female
Gloom	Grass	50% female
Golbat	Flying	50% female
Goldeen	Water 2	50% female
Golduck	Water 1, Field	50% female
Golem	Mineral	50% female
Gorebyss	Water 1	50% female
Granbull	Field, Fairy	75% female
Graveler	Mineral	50% female
Grimer	Amorphous	50% female
Groudon	Undiscovered	genderless
Grovyle	Monster, Dragon	12.5% female
Growlithe	Field	25% female
Grumpig	Field	50% female
Gulpin	Amorphous	50% female
Gyarados	Water 2, Dragon	50% female
Hariyama	Human-Like	25% female
Haunter	Amorphous	50% female
Heracross	Bug	50% female
Hitmonchan	Human-Like	always male
Hitmonlee	Human-Like	always male
Hitmontop	Human-Like	always male
Ho-Oh	Undiscovered	genderless
Hoothoot	Flying	50% female
Hoppip	Fairy, Grass	50% female
Horsea	Water 1, Dragon	50% female
Houndoom	Field	50% female
Houndour	Field	50% female
Huntail	Water 1	50% female
Hypno	Human-Like	50% female
Igglybuff	Undiscovered	75% female
Illumise	Bug, Human-Like	always female
Ivysaur	Monster, Grass	12.5% female
Jigglypuff	Fairy	75% female
Jirachi	Undiscovered	genderless
Jolteon	Field	12.5% female
Jumpluff	Fairy, Grass	50% female
Jynx	Human-Like	always female
Kabuto	Water 1, Water 3	12.5% female
Kabutops	Water 1, Water 3	12.5% female
Kadabra	Human-Like	25% female
Kakuna	Bug	50% female
Kangaskhan	Monster	always female
Kecleon	Field	50% female
Kingdra	Water 1, Dragon	50% female
Kingler	Water 3	50% female
Kirlia	Amorphous	50% female
Koffing	Amorphous	50% female
Krabby	Water 3	50% female
Kyogre	Undiscovered	genderless
Lairon	Monster	50% female
Lanturn	Water 2	50% female
Lapras	Monster, Water 1	50% female
Larvitar	Monster	50% female
Latias	Undiscovered	always female
Latios	Undiscovered	always male
Ledian	Bug	50% female
Ledyba	Bug	50% female
Lickitung	Monster	50% female
Lileep	Water 3	12.5% female
Linoone	Field	50% female
Lombre	Water 1, Grass	50% female
Lotad	Water 1, Grass	50% female
Loudred	Monster, Field	50% female
Ludicolo	Water 1, Grass	50% female
Lugia	Undiscovered	genderless
Lunatone	Mineral	genderless
Luvdisc	Water 2	75% female
Machamp	Human-Like	25% female
Machoke	Human-Like	25% female
Machop	Human-Like	25% female
Magby	Undiscovered	25% female
Magcargo	Amorphous	50% female
Magikarp	Water 2, Dragon	50% female
Magmar	Human-Like	25% female
Magnemite	Mineral	genderless
Magneton	Mineral	genderless
Makuhita	Human-Like	25% female
Manectric	Field	50% female
Mankey	Field	50% female
Mantine	Water 1	50% female
Mareep	Monster, Field	50% female
Marill	Water 1, Fairy	50% female
Marowak	Monster	50% female
Marshtomp	Monster, Water 1	12.5% female
Masquerain	Water 1, Bug	50% female
Mawile	Field, Fairy	50% female
Medicham	Human-Like	50% female
Meditite	Human-Like	50% female
Meganium	Monster, Grass	12.5% female
Meowth	Field	50% female
Metagross	Mineral	genderless
Metang	Mineral	genderless
Metapod	Bug	50% female
Mew	Undiscovered	genderless
Mewtwo	Undiscovered	genderless
Mightyena	Field	50% female
Milotic	Water 1, Dragon	50% female
Miltank	Field	always female
Minun	Fairy	50% female
Misdreavus	Amorphous	50% female
Moltres	Undiscovered	genderless
Mr. Mime	Human-Like	50% female
Mudkip	Monster, Water 1	12.5% female
Muk	Amorphous	50% female
Murkrow	Flying	50% female
Natu	Flying	50% female
Nidoking	Monster, Field	always male
Nidoqueen	Undiscovered	always female
Nidoran♀	Monster, Field	always female
Nidoran♂	Monster, Field	always male
Nidorina	Undiscovered	always female
Nidorino	Monster, Field	always male
Nincada	Bug	50% female
Ninetales	Field	75% female
Ninjask	Bug	50% female
Noctowl	Flying	50% female
Nosepass	Mineral	50% female
Numel	Field	50% female
Nuzleaf	Field, Grass	50% female
Octillery	Water 1, Water 2	50% female
Oddish	Grass	50% female
Omanyte	Water 1, Water 3	12.5% female
Omastar	Water 1, Water 3	12.5% female
Onix	Mineral	50% female
Paras	Bug, Grass	50% female
Parasect	Bug, Grass	50% female
Pelipper	Water 1, Flying	50% female
Persian	Field	50% female
Phanpy	Field	50% female
Pichu	Undiscovered	50% female
Pidgeot	Flying	50% female
Pidgeotto	Flying	50% female
Pidgey	Flying	50% female
Pikachu	Field, Fairy	50% female
Piloswine	Field	50% female
Pineco	Bug	50% female
Pinsir	Bug	50% female
Plusle	Fairy	50% female
Politoed	Water 1	50% female
Poliwag	Water 1	50% female
Poliwhirl	Water 1	50% female
Poliwrath	Water 1	50% female
Ponyta	Field	50% female
Poochyena	Field	50% female
Porygon	Mineral	genderless
Porygon2	Mineral	genderless
Primeape	Field	50% female
Psyduck	Water 1, Field	50% female
Pupitar	Monster	50% female
Quagsire	Water 1, Field	50% female
Quilava	Field	12.5% female
Qwilfish	Water 2	50% female
Raichu	Field, Fairy	50% female
Raikou	Undiscovered	genderless
Ralts	Amorphous	50% female
Rapidash	Field	50% female
Raticate	Field	50% female
Rattata	Field	50% female
Rayquaza	Undiscovered	genderless
Regice	Undiscovered	genderless
Regirock	Undiscovered	genderless
Registeel	Undiscovered	genderless
Relicanth	Water 1, Water 2	12.5% female
Remoraid	Water 1, Water 2	50% female
Rhydon	Monster, Field	50% female
Rhyhorn	Monster, Field	50% female
Roselia	Fairy, Grass	50% female
Sableye	Human-Like	50% female
Salamence	Dragon	50% female
Sandshrew	Field	50% female
Sandslash	Field	50% female
Sceptile	Monster, Dragon	12.5% female
Scizor	Bug	50% female
Scyther	Bug	50% female
Seadra	Water 1, Dragon	50% female
Seaking	Water 2	50% female
Sealeo	Water 1, Field	50% female
Seedot	Field, Grass	50% female
Seel	Water 1, Field	50% female
Sentret	Field	50% female
Seviper	Field, Dragon	50% female
Sharpedo	Water 2	50% female
Shedinja	Mineral	genderless
Shelgon	Dragon	50% female
Shellder	Water 3	50% female
Shiftry	Field, Grass	50% female
Shroomish	Fairy, Grass	50% female
Shuckle	Bug	50% female
Shuppet	Amorphous	50% female
Silcoon	Bug	50% female
Skarmory	Flying	50% female
Skiploom	Fairy, Grass	50% female
Skitty	Field, Fairy	75% female
Slaking	Field	50% female
Slakoth	Field	50% female
Slowbro	Monster, Water 1	50% female
Slowking	Monster, Water 1	50% female
Slowpoke	Monster, Water 1	50% female
Slugma	Amorphous	50% female
Smeargle	Field	50% female
Smoochum	Undiscovered	always female
Sneasel	Field	50% female
Snorlax	Monster	12.5% female
Snorunt	Fairy, Mineral	50% female
Snubbull	Field, Fairy	75% female
Solrock	Mineral	genderless
Spearow	Flying	50% female
Spheal	Water 1, Field	50% female
Spinarak	Bug	50% female
Spinda	Field, Human-Like	50% female
Spoink	Field	50% female
Squirtle	Monster, Water 1	12.5% female
Stantler	Field	50% female
Starmie	Water 3	genderless
Staryu	Water 3	genderless
Steelix	Mineral	50% female
Sudowoodo	Mineral	50% female
Suicune	Undiscovered	genderless
Sunflora	Grass	50% female
Sunkern	Grass	50% female
Surskit	Water 1, Bug	50% female
Swablu	Flying, Dragon	50% female
Swalot	Amorphous	50% female
Swampert	Monster, Water 1	12.5% female
Swellow	Flying	50% female
Swinub	Field	50% female
Taillow	Flying	50% female
Tangela	Grass	50% female
Tauros	Field	always male
Teddiursa	Field	50% female
Tentacool	Water 3	50% female
Tentacruel	Water 3	50% female
Togepi	Undiscovered	12.5% female
Togetic	Flying, Fairy	12.5% female
Torchic	Field	12.5% female
Torkoal	Field	50% female
Totodile	Monster, Water 1	12.5% female
Trapinch	Bug	50% female
Treecko	Monster, Dragon	12.5% female
Tropius	Monster, Grass	50% female
Typhlosion	Field	12.5% female
Tyranitar	Monster	50% female
Tyrogue	Undiscovered	always male
Umbreon	Field	12.5% female
Unown	Undiscovered	genderless
Ursaring	Field	50% female
Vaporeon	Field	12.5% female
Venomoth	Bug	50% female
Venonat	Bug	50% female
Venusaur	Monster, Grass	12.5% female
Vibrava	Bug	50% female
Victreebel	Grass	50% female
Vigoroth	Field	50% female
Vileplume	Grass	50% female
Volbeat	Bug, Human-Like	always male
Voltorb	Mineral	genderless
Vulpix	Field	75% female
Wailmer	Field, Water 2	50% female
Wailord	Field, Water 2	50% female
Walrein	Water 1, Field	50% female
Wartortle	Monster, Water 1	12.5% female
Weedle	Bug	50% female
Weepinbell	Grass	50% female
Weezing	Amorphous	50% female
Whiscash	Water 2	50% female
Whismur	Monster, Field	50% female
Wigglytuff	Fairy	75% female
Wingull	Water 1, Flying	50% female
Wobbuffet	Amorphous	50% female
Wooper	Water 1, Field	50% female
Wurmple	Bug	50% female
Wynaut	Undiscovered	50% female
Xatu	Flying	50% female
Yanma	Bug	50% female
Zangoose	Field	50% female
Zapdos	Undiscovered	genderless
Zigzagoon	Field	50% female
Zubat	Flying	50% female

What actually matters in practice

Gender ratio decides supply. Starters, fossils and most rare lines are 12.5% female, so hatching a female to pass on a species takes about eight eggs on average.
Males pass moves, females pass species. In Gen 3, the offspring is the mother's species; egg moves come from the father if he knows them.
The Breeding Guide covers the mechanics -- how to get eggs, what carries down, and where the Day-Care is.

Where these numbers come from: Emerald Legacy's extracted breeding data for all 389 species -- egg groups and gender ratios, straight from the ROM.

Emerald Legacy Egg Groups & Breeding Chart: All 389 Pokemon

The groups and who's in them

The two rules people trip over

Every Pokemon's egg group and gender

What actually matters in practice

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