When you have caught all the Pokemon and you have beaten the Elite 4 and you Lorelei has all her dolls.
To migrate firered Pokemon to a fourth gen game you must first have the national dex and have delivered the ruby and sapphire to celio once you do that you need at least 6 Pokemon you want to migrate in your PC each can't have HM moves and they can't be eggs. Once you have all that set up save your game in a Pokemon center then put firered in your DS and turn on your 4th gen Pokemon game choose migrate from firered follow the instructions then choose the 6 Pokemon that you wanted to migrate once your done go to the pal park and catch the migrated Pokemon and your done.
A Game
Yes, Pokemon FireRed was made for the Game Boy Advance.
The FireRed Pokemon does freeze on your Shining Opal FireRed hack game because your RAM is low.
Porygon
no you can only trade using a game boy to a game boy with the link cable.
No, Pokemon FireRed version is for GBA.
It is red and it says Pokemon FireRed version or something like that.
You go and get trolled THE GAME
Pokemon FireRed/LeafGreen
Try to go after the rare Pokemon and the rest of your pokedex. If you did that, then start a new game or migrate to Diamond, Pearl, or Platium, or grow all Pokemon to a lv. 100.
It Is In The Game Corner.