Some people just opt for small implants
Personally, I'd never subject a Gardevoir to cosmetic surgery.>>40588035
Yes, the one I trained up and grinded with for a little while was quite potent. Took her and some other Pokemon I was exploring at the time to the Elite Four to test them out and she was quite good. My secondary team in Pearl was Gardevoir, Leafeon, Honchkrow, Vespiquen, Driftblim, and Lucario (was also a meme on /v/ at the time, but also quite good).