You have to transfer from HeartGold or SoulSilver.
trading
it depends what level if it is LV 100 keep it and catch more pokemon, but if it's only lv 70 i would say start over and then get rayquasa later
You catch Kyogre AND TRADE A GROUDON FOR ANY POKEMON BUT KYOGRE go to the Pokemon proffeser he will give you an orb where you can catch raqausa.
first get a kyogre. then beat the elite four 1-2 times . then go to pacidifilog town. then go east and then north. there will be a tower. complete the maze and you will reach rayquasa.
The most powerfull Pokemon in Pokemon ruby i think is Groundon,SAphire Kyogre,Emerald RAyquasa??
luck and only second and subsequent visits
your right but you need the mach bike not the acro bike because i do it with the mach bike and works for me.
in Pokemon ruby there are these legendaries: Groudon, rayquasa, regice, regirock, regesteel, latios. (these are without cheats or events)
This depends on which Pokemon you speak of. If you killed Groudon, one of the regis or Rayquasa, then you can't get them. If it was Latios or Latias that "fled" from a battle you can be sure you will run into them again sometime in the future.
dragon type.
It Is Area Unknown So Someone From The Hoenn Region Has To Give One To You Or Get A Action Replay Then Put In A Cheat Code On How To Get Rayquasa
Get really drunkand have a tatto of your team leader on your butt.Really, there's (just) the Battle Tower, Rayquasa, the Fan Club, many different events, rematches with Wally, Latias, and more.