use pokeballs, i don't know what you mean by the question, if you mean store more then 30 Pokemon in the computer, you go to where it says what box it is and use left/right arrows to change box's
in the pokemon mansion lvl 30 ditto
you can catch spinarak in route 30
get it were mesperit lake is and in the grass use pokeradar.
Evolve a Krilia on lv 30.
You can catch Ditto at route 218. Ditto around there are usually lv 30. :)
you can't catch sealeo but you can catch spheal in rt. 30
on orange trees with honey after a day go to that tree and you have 30% chance to catch it!!
You can catch a Kirlia and evolve it into Gardevoir at Lv. 30.
A Pokemon's catch rate can range from 3 (hardest to catch) to 255 (easiest to catch). Hardest to catch (catch rate = 3): - Uxie - Mesprit - Azelf - Heatran - Regigigas - Giratina - Cresselia - Manaphy - Darkrai - Arceus Easier to catch (catch rate = 30): - Dialga (& Palkia) Easiest Sinnoh legendary to catch (catch rate = 45): - Shaymin
you can't catch muk in emerald but you can catch grimer in the fiery path and get him to level 30 and he will evolve in to muk okay
you can't you have to catch a tentacool then it evolves at level 30.
If you have a teddiursa get it to level 30 to evolve it into ursaing