You have to get the word pokédex Full . than you can catch it somewhere .
It's impossible to catch Jiratchi in Pokemon Pearl version.
You can't catch Dialga in Pokemon Pearl. You'll need to trade for it.
You can't. You can only catch it in pearl and platinum.
You can't
You cant get it in pearl . its only in diamond version same as mr.mime
You can't catch one.You need to trade it from Pokemon Diamond/Pearl/Platinum version
sit on your ds or 3ds
u catch it in turn back cave after u get the nationaldex
to catch another trainers Pokemon on pearl you have to have an action replay system or some kind of flash card
you cannot catch prime Dialga, only normal Dialga!
no, there are no other ways to catch an aipom in pearl version
they r in the ruin maniacs cave