yes.
You evolve the Pokemon; Ralts.
You find Kirlia on Route 203 and 204 using a Poke Radar.
kirlia and snorunt
to get the Pokemon KIRLIA, you have to go to either to the left or above of Jubilife city, and use poke radar everywhere. this will take patience. eventually you will find a RALTS. train this to get a KIRLIA.
Kirlia - Gallade Snorunt - Froslass
You cannot find Gardevior in the wild on Pokemon Diamond you will need to evolve a Kirlia. To catch a Kirlia you will need the Poke Radar. Now use the Poke Radar on Routes 203 and 204 and a wild Kirlia should eventually appear.
you can envolve ralts to envolve into kirlia and to envolve kirlia to gallade but only male and a snorunt but only female
It evolves when you reach lvl 30, which is a Gardevoir. But if you have a male kirlia and you use a dawn stone, you get a Gallade.
Evolve Kirlia Into Gallade,Snorunt Into Froslass
Dawn stone on pearl/diamond/platinum
# snorunt=froslass(female) # kirlia=gallade(male)
It evolves at Level 20 into Kirlia... Thanks for asking