Rowlet, Cyndaquil, and Oshawott will each be getting brand new promos in Taiwan to celebrate the release of Legends: Arceus!
From January 11th to February 28th, KFC restaurants will include one of the promos with designated meals. You will presumably get one of the three cards randomly.
The cards have not been seen in Japan yet, but will likely release in other countries at some point. Thanks goes to Law Y. for the news!