No if you capture them or defeat them they do not come back. The only way to get them back again is to start a new game or trade for them at the GTS.
No Dialga and Palkia don't come back. My friend said he accidentally defeated Dialga and when he came back to check, it wasn't there.
Ahh, no no no. Lemme just clear this up once and for all. The legendaries will come back if you defeat them, but only after you have beaten the Elite 4 again. So say you fight Dialga, and you defeat it. Just fight the Elite 4 and go back to the Spear Pillar and it will be there again.
Correct. If you defeat the Elite 4 after defeating Dialga, he will come back. I never said anywhere in my post that if you defeated all the pokémon Dialga and all the others will come back. We are talking about a specific issue here. Read the thread title.
Really? Im gonna double check and ask my friend again.Ahh, no no no. Lemme just clear this up once and for all. The legendaries will come back if you defeat them, but only after you have beaten the Elite 4 again. So say you fight Dialga, and you defeat it. Just fight the Elite 4 and go back to the Spear Pillar and it will be there again.