This set was released in UFO Catchers to promote Kirby's Adventure. They are generally between 6"-7" in height. There are 7 plushes in the set, each had a different amount in the UFO Catchers:
There are also bootlegs of each of these plushes except for Big Kirby and King Dedede.
Top: "Kirby of the Stars."
Bottom Left: "This is also an item from a Nintendo game. It's a little hard to get because it's a round item, but if you do, you'll want to collect all of them."
Speech Bubble: "[Set contents] 20 each of Regular Kirby, Freeze, Crash, and Noddy, 12 each of Quick Draw, 5 each of King Dedede, and 3 each of Big Kirby."