Kirby GCN (also referred to as Kirby: Legend of the Stars and Kirby Adventure) is the common unofficial title that was referring to any of the three 3D Kirby titles that were silently cancelled.
King Dedede stole Kirby's Warp Star and he is trying to get it back.
Why It was Cancelled
It did not reached the quality Nintendo was expecting.
Some aspects of each of the three individual titles carried over into Kirby's Return to Dream Land and Kirby: Star Allies.