yes it is possible but very unlikely unless he is paralyzed or asleep. I recommend having a Pokemon learn false swipe then use it so he doesn't die and put him asleep with another Pokemon. then use a ultra ball.
You catch Groudon by beating the Elite Four and the Champ (Wallace). Stock up on Ultra Balls and Timer Balls (50-60).
It is not possible to catch groudon in Pokemon sapphire, in ruby, you must either use your masterball, weaken it and use ultra balls, or use timer balls, although the last one takes a loooonng time.
Helpful hint, groudon's earthquake is super effective. That should lower some HP! Try putting it to sleep with one of your other Pokemon don't just use blaskin and groudon! I noticed that my vile plume works great and it's level 29! Use great balls and timer balls and you will eventually get it!
To find out where groudon or kyoge is you talk to the man who gave you castform. First get a strong team and also make sure you've got to the Pokemon league. so you can buy timer balls buy at least 30. Then save the game just before you battle, then just keep throwing timer balls but don't attack.
Well to get Garitina use the master ball to catch Garitina or some dusks balls or timer balls or some quick balls.
Well it depends what Pokemon you want to catch groudon?
You have to catch Groudon or Kyogre in the cave of origin which is also in sootopolis city. If you haven't already beat team aqua or magma in the under water cave that's in route127 its to the left of Ever Grande City and south of mossdeep city then you have to beat them. Don't use the master ball on groudon or kyogre use timer balls and ultra Ball's used 25 ultra balls and then 5 timer.
It really depends. If you aren't going to use your master ball on anything else, then using it on Groudon is fine if you want to. But you can catch it with a Poke ball or Great Ball, etc. Use dusk balls or ultra balls. It is not worth it to use masterball because groudon is not so hard. I caught groudon with only 3 ultra balls.
A timer ball is good to use when you want to catch a Pokemon you've battled for a while. The more turns you have in a battle, the better more chance you have to catch to Pokemon with a timer ball. (I caught my Groudon in Emerald with a timer ball ^_^)
Go into the groudon cave and beat team magma. and then catch groudon with ultra ball or timer ball.
Use your strongest Pokemon, do not attack, buy 15 Ultra Balls, 5 Great Balls, 20 Poke Balls, and 6 Timer Balls. Keep using the balls, save 5 of the Ultra Balls then use a few Timer Balls. They are guaranteed to catch Deoxys.
Well what you need are dive balls,premier balls,timer balls,and quick balls.