You can't. Latias is only available in heart gold. You might be able to trade it though.
latias
You can't
No, you can only get Latias in Sapphire and Emerald and Latios in Ruby and Emerald.
need to migrate or trade
latias is in the MOVE called Pokemon heroes
you cant. You can only catch it in Pokemon emerald, but, you cant catch latias in emerald.
latias
In pokemon Heartgold
You can only get Latias in Diamond by importing it from PalPark.
You can find latias on every route in hoenn.
Yes.
Yes, Pokemon Sapphire version is the version in which you can catch Latias. You can only find it once you have beaten the Pokemon League, then there is a report of a legendary red flying Pokemon in Hoenn. Latias appears randomly.
You can't
For Pokemon ruby you can catch the three regis, rayquaza, groudon, and latios/latias. In sapphire you can catch the three regis, rayquaza, kyogre, and latios/latias. However, in emerald you can catch kyogre, groudon, rayquaza, the three regis, and latios/latias.
You keep chasing it out of the Forest back to the town or i think you catch it.
Latios is unavaliable in Pokemon Platinum.
No, you can only get Latias in Sapphire and Emerald and Latios in Ruby and Emerald.