- Development Gag: Seeing how long it took for this game to be released, there are quite a few of these, notably HR-D3 being a retooled model of the Dedede Robot from the E3 2005 trailer for the canceled GameCube game (and Kirby Quest).
- The music from the E3 2005 trailer for the canceled GameCube game was also used as The Arena's battle theme for this game.
- Look familiar?
- Also from the GameCube game, it shows the ability to stack multiple players/helpers before this game uses it.
- One part of the development is a stage that is played in full 3D. Later on, this concept is revisited in Kirby: Planet Robobot's Kirby 3D Rumble and its standalone eShop title, Kirby's Blowout Blast.
- 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.
- Fan Nickname: Thanks to The Runaway Guys, Magolor has gained the nickname Sinister Elmo.
- Market-Based Title: Was originally called Kirby Wii, although the game's final Japanese title is "Hoshi no Kirby Wii" and the PAL version is "Kirby's Adventure Wii".
- Moved to the Next Console: The game is what ultimately became of the scrapped GameCube game.
- The Other Darrin: Director Shinya Kumazaki and one of the design staff take over for Dedede and Meta Knight, respectively. (Waddle 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.
- Recycled Script: This game is essentially the gameplay of Kirby 64: The Crystal Shards merged with the plot of Milky Way Wishes. There are 120 energy spheres scattered throughout the game that require skill, paying attention, and/or having the right power to collect them. Two of Kirby's enemies team up with him. As for the plot, Magolor asks you to collect the lost parts of his ship so that he can return home, then he offers to take you there. Once there, you retrieve a dangerously powerful artifact, which Magolor steals from you to rule the galaxy, and you have to stop him.
Trivia / Kirby's Return to Dream Land