Update!
Well, after 2:59 playtime (Yes, I checked), I found a suitable Ralts for this challenge (Yeah, it took me that long to find a Modest/Timid one, I got a Modest one). Although I wanted the Trace ability, I was done with that scene XD
Powerleveled Ralts up to level 6 so it could learn Confusion, then I took him from there.
Got to Rustboro City and Ralts was level 14. Trained through the next route with Rusturf Tunnel, and hit level 16. The gym trainers were easy, Roxanne...not so much. Took me around 7 tries to finally get her beaten. Spamming of Double Team? Yes, yes indeed.
Kicked May's butt on my way out, and headed to Dewford. Made my way through Granite Cave easily, and then finished Dewford by kicking eveyone in the gym's butts. Oh boy, Ralts evolved!
Arrived in Slateport, and took out the trainers in the hut and beach. The Museum was a bit tricky though. I was forced to teach Kirila Thief so I could damage the twin Carvahna's that were held within.
Finished up with the trainers on route 113, and entered the Trick House.
Kirlia
Level 25
Modest Nature
Calm Mind
Confusion
Double Team
Thiefg