Use Pokeradar in the grass right above Jubilife City. Ralts and Kirlia are available through pokeradar so If you get a ralts you can always evolve it if you can't find Kirlia.
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.
yes.
You evolve the Pokemon; Ralts.
You can't get Kirlia in the wild in Pokemon Black. But you can get it by:Transferring Kirlia into Pokemon BlackTrade for it.Have a Ralts evolve into Kirlia at level 20.
You can find Kirlia on Route 203 and 204 by using your Pokeradar.
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
kirlia is not available in the wild. you would have to catch a male or female ralts during a mass outbreak, and evolve it into a kirlia.
catch ralts and train him to an kirlia and give him an dawn stone(Kirlia must be an boy)
you can envolve ralts to envolve into kirlia and to envolve kirlia to gallade but only male and a snorunt but only female