>>21895519In BW2, if you play as the guy, you find a lost Xtransceiver, and get a call from a girl who lost it, she only has an old model without video.
Throughout the game, there are specific tiles where she will call you when you stand on them (they arent indicated in a special way, the thought is that you just step on them while exploring), after enough calls, she will ask to meet up in person at the ferris wheel so you can return her lost Xtransiever.
You meet up, and she is a qt (pic related), she gets her Xtransiever back, and you can now call her and stuff. First time you call her after meeting up, she remarks on how she was surprised you were the same age as her.
As you call her more and more, her sprite changes to a blush, it should be noted that most of the calls are about hobbies, her having a cold, her siblings being "jealous of her talking to you", that kinda thing. After 50 calls or something, you can call her and ask her to meet up, where you ride the ferris wheel together, and she trades you a HA pokemon for anything.
Its hard to describe why this is a proper waifu unless you read all her dialogue (its on her bulbapedo page), But yeah.