Over the course of around the past 17 months, the official Kirby Twitter account would post special illustrations of the Kirby cast in celebration of the 25th anniversary of the series. With the 25th anniversary finally coming to a close, HAL will be releasing these illustrations in a postcard-sized set dubbed the "Pupupu Memories Box."
The box will contain 47 prints in total and can be preordered on this website (Japanese). We'll let you know if they will be available anywhere else that ships internationally!
In the meantime, we compiled all of the illustrations (plus a few more) into one easy-access page if you want to take a look at all of them! They're adorable and have an art style that I personally love, so definitely do so if you haven't already.