Well, honestly arcanum, my first question would be what nature is it? Lol, because I have a thing for gallades at the minute a shiny one would be really nice. But anyway, to your dilema, with the berries around that can reset the EVs of a pokemon it's entirely plausable that you could lend her the pokemon, let her work with it and raise it and when she sends it back you blank its evs incase you want to train it yourself. The problem with a pokemon like ralts is if you want a certain evoloution of it, since kirlia will evolve to gardevoir at a relativly low level (compared to the level nessecary to beat the elite 4) you'd have to decide if you wanted to give her the freedom to evolve it how she likes, tell her what she's got to evolve it into or have her keep it as a kirlia using an everstone. That's the only real problem I see with 'lending' her your shiny ralts. On a side note, I'm wondering what I did with my pearl version. I started raising a competative team, then gave up, but that was after I was trying to get a bunch of rare candy finding zigzagoons so I could try the RNG shiny method. I might go back to that if I bother to look for my game, that way I can actually get my first shiny on pearl. I was upset that my sister got a pre-owned diamond version and then on her first run-through found a shiny shinx =(