yes the legendary birds are pro
you only have to beat the elite 4 on Pokemon fire red not ruby
Fire and water are the best combination to beat the elite 4.
One island.
The same you can do in Fire Red.Read my answer to that here:What_can_you_do_after_you_beat_the_elite_four_in_pokemon_fire_red
You have to migrate them, which I think can only be done when you beat the elite four.
It can be anywhere, use the marking map app to find them.In Pokemon Platinum, yes of course You can Find the Legendary Birds: Moltres The fire type Bird, Zapdos The electric type bird and of course Articuno The Ice type bird. First You need to Beat The Elite Four SecondFirst you beat the elite 42nd complete the sinnoh pokedex3rd show it to the professor4rth prof oak will tell you theres the 3 bird pokemon roaming in platinum
Its best if you have 1 fire Pokemon and 1 ground Pokemon.
against the elite four infernape will do very good with its fire type moves but since the first gym is ground it is not so easy to beat it with a fire type. i beat the elite four 6 times with my infernape. the beat moves for it are fire blast and flame wheel
See question "Is this a good team to beat the elite four"'s answer.
use cheat codes
first you need the rubys in fire red but first beat the elite four
All have to be high level:one water.(to beat elite flint/fire) one legndary.(To beat strong Pokemon /psychic/Cynthia's)one normal.(to beat some of Cynthia's and others)one flying(to beat ground)one backup(normal)one fire(to beat the bug type)