You can't get diagla in Pokemon pearl without trading but the way to get him in the pearl pokedex is by going to celestic town and going into the big house and talk to the old lady.
Only AFTER you beat the Elite four.
you can get diagla on dimond
diagla and murkrow
you dont
in pearl palkia in diamond diagla
You can and its fun
In Diamond & Pearl? Impossible without migrating, trading, or Action Replaying.
You can't without trading, migrating or, cheats
You don't. Its not possible
Trading, Migrating, Catching the legit legendary Pokemon in pearl, etc.
Yes. You can only get GLAMEOW'S in pearl and STUNKY'S in diamond. Also you can only get PALKIA in pearl and DIAGLA in Diamond
You need to dig in the underground.
Palkia and Giritina can learn dragon claw.