In Pokémon Blue you can find Articuno (on the Seafoam Islands), Zapdos (at the Power Plant), Moltres (in Victory Road) and Mewtwo (in the Cerulean Cave).
articuno, zapdos, moltres, and mewtwo
all legendary pokemon is available............
In ruby and sapphire and emerald there is a legendary Pokemon called latios it is a dragon psychic type looks like a bird with blue on it.
Catching Moltres on Pokemon Blue is rather challenging since it is a legendary Pokemon. A common method used for catching legendary Pokemon is lowering their health and then using a move that gives them the Sleep status. Once the legendary Pokemon is weakened and asleep they should now have the highest chance possible to be caught by a pokeball. Ultraballs are the main pokeball type used for catching legendary Pokemon outside of the Masterball since they are easily bought at pokemarts.
There is no legendary Pokemon in Undella Bay.
all legendary pokemon is available............
There are 4 legendary Pokemon on Red, Yellow, and blue. Maltres, zapdos, articuno, and mewtwo.
you get mewtwo in the cave next to cerulean c:
Well none since ho-oh isn't in blue
nowhere
The rare, non-legendary Pokemon in Generation I (Red, Blue, Yellow, Green) are:PikachuRaichuClefairyClefableVulpixNinetalesMeowthPersianFarfetch'dExeggcuteHitmonleeHitmonchanLickitungRhyhornRhydonChanseyTangelaKangaskhanStaryuMr. MimeScytherJynxElectabuzzMagmarPinsirTaurosLaprasDittoEeveeVaporeonJolteonFlareonPorygonOmanyteOmastarKabutoKabutopsAerodactylSnorlaxDratiniDragonairDragonite
In ruby and sapphire and emerald there is a legendary Pokemon called latios it is a dragon psychic type looks like a bird with blue on it.
yes you can
Zapdos Articuno Moltres Mewtwo Mew
You need to recruit one of the legendary birds. The island is automatically unlocked.
i am not sure about if they are the leader but they can be a partner
yes all Pokemon evolve in Pokemon mystery dungeon blue rescue team after you beat Rayquaza and legendary Pokemon don't evolve.