in Pokemon diamond after you beat the elite four go ta canalave city talk to the sailors child notice he would be in bed. talk to the sailor he will ask you to go to full moon island once you get there you will find cresselia
If you have already caught them and saved, you cannot re-battle them again. If you made them faint, you have to battle the Elite Four again to make them respawn.
no
cresselia
Do whatever you want!
When you reached your 21st battle you will battle Palmer and his Pokemon are: Dragonite, Rhyperior, and Milotic When you reached your 49th battle you will battle him again and his Pokemon are: Heatran, Regigigas, and Cresselia
Rebattle Cresselia and Giratina To activate use L+R 94000130 fcff0000 B21c4d28 00500000 B0000004 00000000 000013b8 01011903 C0000000 00000017 200013bc 00000001 D2000000 00000000
Catch a Pokemon with it! I'd recommend saving it for Cresselia, as she flees from battle a lot.
Re-battle Latios/Latias & Mew (DMA) Re-battle Lugia & Ho-oh (DMA) F28AEEBB E96723FB 719C9601 0AFEE31A Re-battle Deoxys (DMA) Re-Battle Groudon & Kyogre (DMA) 404F4203 DEDBC3F7 67DAF8E7 3F6C38D6 And the best one Re-Battle Rayquaza (DMA) 67BD0A40 0DD73EBA
on the 21st battle streak he will use a dragonite, rhyperior, milotic.. and on the 49th streak cresselia, heatran and regigigas..
After a little while into the post game, Cresselia starts appearing into your dreams or at least Darkrai is. He was pretending to be Cresselia. Cresselia is really good, but the Cresselia in the dreams are Darkrai's doing.
When you find them out of their gyms the second time, talk to them and they'll give you their number. If you call them they say what day you can re-battle them. You'll re-battle them at the Dojo in Saffron City next to the Gym. When it is the day where you can re-battle them, go to the Dojo and they'll be there.
I looked it up, you can get Cresselia, but it doesn't say how. It only says you can get Cresselia at Sharpedo Bluff.