I acquired all the pokemon in the reboot series of Fire Red three times. At the time, my best friend had Leaf Green and Ruby, while I had Sapphire. Now, I am attempting to get both pokedexes filled completely in FR and Emerald. I have cross referenced the pokemon that are attainable in the respective regions and have found that only surskit and its respective evolutions, Entei, and suicune are the only three pokemon I will not acquire without cheating, which I have every intention of doing.