The best ball to use on her is a quick ball .
Cressilia is a 4th generation Pokemon so you can't catch it in Pokemon Emerald.
You have to trade from Diamond, Pearl or Platinum
After you go see cresillia you get the lunar (located where cressilia was) give it to the sick boy in canalave then go ship and go to the new island that appeared the find darkri and click on him and you get to battle him you can catch or fight darkri
It actually isn't so special; a Premier Ball's catch rate is the exact same as a regular Poke Ball.So, it's like a Poke Ball that costs 10 Poke balls with a different entrance effect.
Get one by using cheat code, trade or you won't be able to get one.
Master ball catches anything in one go, btu theres only one of em.
If you haven't caught Cressilia yet, you go to Canalave City, go to the sailors house and talk to the little boy. After you do that, go talk to the sailor and ask him to go to fullmoon island go inside and you see Cressilia. If you dont catch her, she will rome like the three birds. She drops thne lunar wing. take the wing to the little boy at the sailors house and then catch cressilia
Ultra ball.
Yes you can and if you do catch the ball the person who threw it is out
Once you catch Heatran you've finished the game, unless you are still to catch Dialga, Palkia, Giratina, Mespirit, Azelf, Uxie or Cressilia. You can also fill in your Pokedex. Basically, the main storyline is complete.
U have to catch deoxys with a timer ball or a master ball! He is lv 80. U have to catch deoxys with a timer ball or a master ball! He is lv 80.
You can not catch them in a luxury ball, sorry dude.