They Will come back after a week, so you should have caught them
You can't sorry. Try getting Pokemon platinum or pearl.
dialga is more powerful
go to twinleaf town then catch polkia to calm him down
Ok, first thing, it is Dialga and Palkia, second thing, it depends on which one you like best or which one has the best battling moves. So, really, you can't have a full answer.
You have to clear spacial rift again after defeating darkrai at dark crater.you must defeat palkia. he will ask you if he can join your team.
Pokemon modefier from action replay.
u have 2 go 2 the top of mt. coronet[spear pillar], and battle commander mars and Jupiter then boss. diamond is dialga, pearl is palkia. u can't heal ur Pokemon, so i suggest using a master ball right away if u still have it
to catch polkia you need to go to mt.corenet and find the top floor and theres polkia!
I don't think you can catch Polkia..
You get Polkia by going to Spear Piller (on top of Mt. Cornet).
Palkia is an event Pokemon. You must have the 12th movie Arceus and talk to someone [I'm not sure who] in the Ruins of Alph. He will take you to the Sinjoh Ruins and you may have a choice between Dialga, Palkia and Giratina all at level 1. The scene where Arceus summons who ever you chose is perhaps the only scene showing the real world.
you dont go into town you go to route 210 then to the very top of mt coronet and just before you meet dialga or polkia you find an egg and thats how it works but you have to have all the badges