PokéBase - Pokémon Q&A
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2 Answers

4 votes
 
Best answer

All Legendaries that were obtainable are:

Articuno
Zapdos
Moltres
Mewtwo
Raikou(depending on Starter)
Entei(depending on Starter)
Suicune(depending on starter)

Legendaries only obtainable in events(not Obtainable anymore)
Ho-Oh
Lugia
Deoxys

Here a locations of the obtainable Pokemon

http://serebii.net/red_green/legendary.shtml

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3 votes

The three legendary birds (Articuno, Moltres, Zapodos), Mewtwo, and one of the legendary beast depending on your starter.

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