Development Hell: This game started as the Nintendo GameCube title, was scrapped, then went through several re-imaginings until this became the final product. According to this interview, development started as soon as Kirby 64 was completed, meaning it took eleven years for it to be released.
The Other Darrin: Director Shinya Kumazaki and one of the design staff take over for Dedede and Meta Knight, respectively. (Bandana Dee is silent.) They do a good job imitating Sakurai, Dedede's previous voice actor, and Atsushi Kisaichi, Meta Knight's previous Japanese voice actor.
Working Title: Was originally called Kirby Wii, although the game's Japanese title has been announced as "Hoshi no Kirby Wii."