That's the one left of Oldale town, right? Seedot (rare), Lotad, Zigzagoon, Poochyena, and Ralts (rare). Get a Ralts, they're fantastic.
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route 102
On Route 102
You can't find a Kirlia; you must evolve Ralts which can be found on route 102 in Emerald.
You can find the pokemon Arba in route 102, right before you reach Petalburg city, in the upper patch of grass.
Go to Petalburg city, then walk to the right you will be in Route 102. There in the bushes you can find Ralts. (The chance to find Ralts is 4 in 100).