No
the starter Pokemon are charmander, bulbasaur, and squirtle.
Yes. First you have to beat the Elite Four in both games, then do the stuff for Bill in FireRed
it's magicYou can't find him , he appears after you have completed an event - i.e getting your first Pokemon , leaving Lavender town or in Saffron city
You cannot get Cacnea in PKMN Firered because Firered is in Kanto and Cacnea makes its first appereance in Hoenn
water or grass type Pokemon
No, you can't. Stadium is Generation I, while FireRed is Generation III. And as any Pokemon fan can tell you, Generation I is incompatible with Generation III. That's why they made FireRed and LeafGreen in the first place!
Simply go inside.
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.
it is to the left of viridian city-where you defeat Gary for the first time
There is no Ho-OH. you would have to trade it from the first Pokemon Colosseum.
first get them on firered/leafgreen from the seven islands, then migrate them
First, you have to trade your Pokemon Colosseum with Ruby/Sapphire (And I think Leafgreen/Firered too) Once you do that, you have to get the Pokemon to leafgreen/firered, and then migrate them to Pokemon diamond/pearl. For this though, you have to had beaten the games.