Question

Please list them here

Answer 1

Generation 1

• The legendary birds: Moltres, Articuno, Zapdos
• The Mew duo: Mew and Mewtwo

Generation 2

• Legendary beasts: Raikou, Entei, Suicune
• Tower duo: Ho-Oh and Lugia
• Celebi

Generation 3

• Legendary golems: Regirock, Regice, Registeel
• Eon duo: Latios and Latias
• Weather trio: Rayquaza, Kyogre, Groudon
• Jirachi
• Deoxys

Generation IV

• Lake guardians: Azelf, Mesprit, Uxie
• Creation trio: Giratina, Palkia, Dialga
• Lunar duo: Cresselia and Darkrai
• Sea guardians: Phione, Manaphy
• Regigigas
• Heatran
• Shaymin
• Arceus

Generation V

• Swords of Justice: Terrakion, Virizion, Cobalion, Keldeo
• Kami trio: Thundurus, Tornadus, Landorus
• Tao trio: Kyurem, Zekrom, Reshiram
• Meloetta
• Genesect
• Victini

Generation VI

• Un-named mascots: Yveltal and Xerneas*

*= unobtainable at the moment

I've added a link for each Pokemon, which will direct you to a list of their locations in every game. Sorry this took so long.

More info:
http://bulbapedia.bulbagarden.net/wiki/Legendary#List_of_legendary_Pok.C3.A9mon

Comments

Add an edit to where i could find them in the games name?

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Done. :D

Answer 2

Red, Blue, Yellow, FireRed, LeafGreen

• Articuno
• Zapdos
• Moltres
• Mewtwo
• Mew

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Gold, Silver, Crystal, Heartgold, Soulsilver

• Articuno
• Zapdos
• Moltres
• Raikou
• Entei
• Suicune
• Lugia
• Ho-oh
• Mewtwo
• Mew
• Celebi

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Ruby, Sapphire, Emerald

• Regirock
• Regice
• Registeel
• Latias
• Latios
• Kyogre
• Groundon
• Rayquaza
• Jirachi
• Deoxys

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Diamond, Pearl, Platinum

• Uxie
• Mesprit
• Azelf
• Dialga
• Palkia
• Heatran
• Regigigas
• Cresselia
• Phonie
• Manaphy
• Darkrai
• Shaymin
• Arceus

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Black, White, Black 2, White 2

• Cobalion
• Terrakion
• Virizon
• Tornadus
• Thundorus
• Reshiram
• Zekrom
• Landorus
• Kyurem
• Keldeo
• Meloetta
• Genesect