Cheatt
Yes
If you finish ruby get another version of pokemon.
After Latios comes Kyogre, the legendary Pokemon for Sapphire Version.
Deliver it to celio and now you can trade with sapphire or ruby version. To trade with emerald you need two wireless adapters. Also after that finish the pokedex oh and try the trainer tower.
beat the elite 4 then finish your hoenn pokedex prof birch will give him to u
I really don't know. The last Pokemon of the pokedex are the hardest to find and or catch. I have been playing this game since i was little and i can honestly tell you that the pokedex is impossible to finish. Give up.
yes after you complete the hoenn pokedex professor birch will call you and give you one of the pkmn gold version starters
no but if you beat the elite four and you have seen every single Pokemon in the Sinnoh pokedex, you can go to Pal Park and migrate your Pokemon from your Ruby version there.
You can link and trade Pokemon with Sapphire and Emerald Versions. If you want a national pokedex, trade with leaf green version
after you beat the elite 4 you should automatically get it if not see professor oak
beat the hoenn pokedex and go to prof.birch
you don't need a national pokedex to trade from ruby to leaf green. You have to get the gems the sapphire and the ruby in order to trade from leaf green to ruby. These are found in leaf green. (: