After I got a Wii U and transferred my ACCF town from my Wii to my Wii U, I made a post explaining what would be different when playing on Wii U. I had believed that Katie and Kaitlin used WiiConnect24. And since Wii U doesn’t support WiiConnect24, I thought they could not appear when playing the game on Wii U.
Well, I was wrong. Look what I saw in my town today.
Katie wanted to be returned to Tropical, which is my friend Yann’s town. Apparently the Katie/Kaitlin data can be exchanged when you play with someone on Wi-Fi. (I played with Yann on Christmas Eve). So for better or worse, the Wi-Fi cats are still around. I assume the same applies for Blanca as well.