Rare Candies XL from Origin Forme Palkia Compensation Research, catched in the Legendary Hour

If you haven't claimed your shiny Palkia yet, catching it during next Wednesday's Legendary Hour will earn you a free XL Rare Candy.

This is due to the seasonal bonus: "Trainers level 31 and above will receive a ++ Rare Candy upon catching a five-star raid boss during a Raid Hour."