Combined with the sapphire the ruby and sapphire will allow you to trade with ruby and sapphire and emerald.
For bling .
clafairy
Use Dive.
on groudon
You don't. You have to trade an eevee to Pokemon Ruby to use one in the game.
u have 2 use a computer
use a moonstone
use the itemfinder
Use a GameShark.
EVEE
Yes.