I started the lineart and sketch for this a while ago, but I didn't get around to coloring it until now.
Yes, this is a Gardevoir gijinka, and those ginkgo leaves (yes, they are supposed to be ginkgo leaves) refer to the ones in episode 386, when Max saves a Ralts. At the end, there's a scene with Max hugging the Ralts and promising it that he'll make it his first Pokemon. That's when ginkgo leaves blow all over the place. XD
It's called "Do I Hear a Ralts?" in the English dub. (Damn the English dub.) I watched it in Japanese and thought it was so damn cute! XD