Other contributors have said "Can you get pokemon fire red omega off ebay?" is the same question as "Where can you get Pokemon Fire Red Omega?" If you believe that these are not asking the same thing and should be answered differently, click here
Look up on YouTube "Fire Red Omega Tutorial" A link to mediafire will be there. Open it and simply download. You will need a VBA though. I downloaded it and it works perfectly.
mewtwo the three dogs (Raiko Entei and Suicune) and im pretty sure you can get the three birds as well (Moltress, Articuno, and Zapdos). sorry about mispells
I'm assuming you ment the version exclusive Pokemon that are not in leaf green, so here they are: Ekans, Arbok, Growlithe, Arcanine, Psyduck, Golduck, Oddish, Gloom, Vileplume, Shellder, Cloyster,...