You'll need Pokemon ruby.
If you mean ruby to sapphire, then you'll need both games, two gba's, and a link cable.
YES.you have to complete Pokemon colloseum and Pokemon ruby and then you need a gameboy gamecube connector. Then you can trade whenever you wantinjoyBSWIFT
Gastly is unobtainable in Pokemon Ruby. You need to trade one from Pokemon Firered or Leafgreen.
Sableye isn't available in Pokemon ruby. Only in Pokemon Sapphire. You need to trade it in.
nope you need to trade
Apparently Groudon, but you need to trade with ruby to be able to obtain him.
You can trade from Pokemon Ruby to another Pokemon Ruby using a link cable.
You need to trade it with a Pokemon from LG or FR,
SO that you can trade with POKeMON sapphire and ruby.
you need to trade it from ruby
you cant u need to trade it from Pokemon ruby or emerald
Poliwhirl can't be caught in Pokemon Ruby. You need to trade it from Leaf Green or Fire Red.
No, you'll need to trade for it.