groudon is extremely effective against the entire elite four and bery good against steven. fire affects most steel and ground moves such as earthquake will damage most people. catch groudon
level 100
The Champion of the Hoenn region in Pokemon Ruby and Sapphire is Steven Stone.
If you mean "Is Juan the leader in Pokemon ruby?", then no. It's Wallace who's the leader. Juan is leader only in Pokemon emerald. The champion is Wallace in Emerald, but Steven is the champion is Ruby and Sapphire.
use a good fighting type Pokemon like machoke and use its moves
Go to Ever Grande
You get your first Pokemon, then warp back there after beating the Pokemon league.
journey again to achieve the another battle called the 8th gym Pokemon ruby
You can get ditto in Pokemon ruby by beating the Pokemon league then going to the cave the fossil maniac is digging he will be finished digging and he will say to be careful that there are Pokemon in there the Pokemon in there are ditto.
train
after compliting first pokedex and beating league gampion.
I'm going to assume you mean "Pokemon Ruby" in your question. Anyway, to trade between Ruby and XD, you must beat Pokemon XD and defeat the champion in Ruby.
ememrald only and you have to beat the pokemon elite four and pokemon champion first