you cant. only in leaf green you can catch misdreavious.
no but you can in emerald after catching 202 Pokemon
You have to trade for it.
By trading and catching them i think
Get the other 249.
You cannot catch a Feraligatr in Pokemon FireRed. You can, however, transfer one from Pokemon Colosseum by catching Croconaw and evolving it into Feraligatr, then transferring it.
Not by catching it. You have to trade it from another game like LeafGreen.
by catching, evolving, and trading pokemon.
Capture Entei/Raikou/Suicune.
the top of that building, on Route 15.
With Exp.Share - you can get this from Prof.Oak's Aide by catching an amount of Pokémon.
there is a one and a millionth chance of getting a shiny Pokemon in Pokemon fire red
Migrate pokemon. Go to pal park do the catching show. Catch'em all!!