There are differences of pokemon diamond and pearl.

D: mime jr.
P: bonsly

D: dialga
P: palkia

D: scyther(after national dex)
P: pinser(after national dex)

D: stunky
P: glameow

D: skuntank
P: purugly

D: mr. mime
P: sudowoodo

Those are just a few differences if you are wondering, but there are more so why don't you find them out for me.