You have to beat the Pokemon league first and then they just appear randomly in the wild depending on the starter Pokemon, Squrtile you get Raickou (Electric type), Charmander (Water type) you get Suicune, Bulbasaur you get Entei (Fire type)
Zapdos arcticuno moltres
find one then use pokéballs ofcourse!
Deoxys is a legendary Pokemon which has various different forms. To find one in FireRed version, you need to have an Aurora Ticket.
Moltres is a legendary Pokemon from the first generation of games. It is a Fire and Flying type and can be encountered in Pokemon FireRed in Mt. Ember.
You would have had to chosen Charizard as your starter Pokemon. Whichever legendary dog appears depends on your starter. You will find your legendary dog randomly in the wild. (you must beat the elite four first)
The legendary birds are found at the power plant, mt ember and seafoam islands.
Well there is no such thing as the best legendary, everybody has his own tastes. The higher leveled legendary you find here is Mewtwo.
Raikou is a legendary dog Pokemon. It is not in any specific location in Pokemon Fire Red. Instead, you can find it roaming Sinnoh.
you can get every pokemon using codes you can get legendary pokemon such as mew regi's HO-OH Lugia every kind of pokemon
On Pokemon Fire Red you can find the legendary pokemon: Articuno-at sea foam Island Zapdos-at power plant Moltres-at Mt.Ember Mewtwo-Cerulean cave Unknown-Tanoby Ruins
Without cheats or any events they are Moltres Articuno Zapdos And Mewtwo
The legendary dog you find the dog that has a type advantage over your starter.