you don't. there is no way to get latios OR latias in d/p. You can migrated it from earlier games though...
You must find AR codes for latios/latias are not wild in Diamond. I do not have an AR code for latios/latias. Sorry.
you cant catch latias or latios in diamond/pearl. you can migrate latias and latios from emerald, ruby, sapphire. in case you dont know, you get latias/latios at the end of the game and the mother tells you what color(red-latias/blue-latios) the guy on tv says. the hard part is to find it. it randomly appears any where on hoenn.
The only way to get a latios or latias in your Diamond or Pearl is to migrate, latios from Ruby or Emerald. latias from Sapphire or Emerald.
need to migrate or trade
You can find Latias and latios anywhere in Hoenn. You just have to get lucky.
Rayquaza, Latias, or Latios
dude or dudet u cant get a latios or latios in Pokemon diamond/pearl. so stop asking by the way u can only get em in ruby emerald sapphire gosh buttox rox :p licky
Latias and Latios
You can only get latias in sapphire get latios from ruby or emerald.
Latiasyou cant find latias in Pokemon ruby you can only find it in sapphire. in Pokemon ruby you get latios no, you get latias in ruby and latios in sapphire because of the colour, Latias is red means ruby,latios is blue so means sapphire. your right above me but you got it mixed up. No its latias in sapphire and latios in ruby trust me i took forever trying to catch latias in sapphire and i finally did.
Yes you can. later in the game Latias (or latios depending on which game you have) is attainable. Like mesprit in Pokemon diamond and pearl and like mesprit, latias and latios tend to flee.
level 40