Arceus is not possible to find in Pokemon Ruby. It was released in 2007 with Pokemon Diamond and Pearl
if you want to catch arceus you can,t but if you get Pokemon arceus version avalible on eBay and a connecting cable you can trade arceus with yourself so you can have it on ruby.
Arceus is a sinnoh pokemon. unless you have a gameshark and a code, you cant get it in ruby.
You won't be able to and if you could Ruby would mess up because that's not a Pokemon in ruby.
you have to cheat or you cant
You can't catch arceus in pokemon white.
you can find arceus in the hoenn region.
Pokemon ruby's version IS Pokemon ruby.
The new pokemon, Arceus. Go to pokemon.com to find out more about arceus.
Where ever you find normal Arceus. :p
Sorry to tell you but u cant get them in ruby because they werent even thought of wen ruby was made
In this generation of pokemon arceus doesn't exsist yet. So sorry but you can't find it in leaf green or fire red. arceus is in the next generation A.K.A. pokemon platinum /peril/diamond.
aftewr you get your national pokedex you will get a place where you can catch it only of you have the bayleaf on Ruby.