FireRed has the same legendary poke'mon as LeafGreen. You can capture:-
Mewtwo in Cerulean Cave
Articuno in Seafoam Islands
Zapdos in the Power Plant
Moltres in Ember Island
Lugia in Navel Rock
Ho-oh in Navel Rock
Suicune roaming around Kanto if your starter is Charmander
Raikou roaming around Kanto if your starter is Squirtle
Entei roaming around Kanto if your starter is Baulbasaur
Jirachi roaming around Kanto
No
No legendary resides on the islands a rare Pokemon resides on seven island in the tanoby chambers the Pokemon is unown.
migrate from firered and leafgreen
If you're talking about the legendary Pokemon Articuno, you have to trade it from FireRed or LeafGreen. If you're talking about Delibird, you have to trade it from FireRed.
Well there is no such thing as the best legendary, everybody has his own tastes. The higher leveled legendary you find here is Mewtwo.
moltres
No
the 3 birds
(Excluding legendary pokemon) It should be dragonite...
Moltres is a legendary Fire and Flying Pokemon. Part of the original trio of legendary birds from the first games, it can be encountered in Pokemon FireRed in Mt. Ember.
yes but it depends on who and what you are fighting
There are not many glitches in Pokemon FireRed. There is one rather nasty glitch though involving roaming Legendary Pokemon. In Pokemon FireRed if a roaming Legendary Pokemon escapes battle with the move Roar it will disappear from the game rather than move to a new location.
articuno zapatos moltres and mewtwo
No legendary resides on the islands a rare Pokemon resides on seven island in the tanoby chambers the Pokemon is unown.
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The legendary birds, Mew, and Mewtwo.
You have to trade it from FireRed or LeafGreen