4th Kirby game to be Rated E10+ (Everyone 10+) by the ESRB after Kirby's Return to Dreamland (2011) Kirby's Dream Collection: Special Edition (2012), and Kirby Battle Royale (2017).
This game has two references from an episode of Kirby Right Back at ya (2001) called Frog Wild like King Dedede with big muscles which is a transformation when he was possessed by the Demon Frog and Kirby with an evil smile which was first used when Kirby was possessed by the Demon Frog.
The first Kirby game to have helpers since Kirby Super Star (1996) and the first appearance of the cleaning ability and the bosses Pon & Con since Kirby's Dreamland 3 (1997).
The Mirror, Jet, Tornado, Needle, Cupid, Animal, Spear, Archer, Circus, Poison, and Doctor Abilities were rumored and planned to appear in the game with their helpers Smirror, Capsule J3 (Replacing Capsule J from Kirby Super Star (1996) and Capsule J2 from Kirby Super Star Ultra (2008)), Spynum, Clown Acrobot, A new enemy for the Poison ability, and Chemitory.
The fifth game of the franchise to run at a 30fps after Kirby 64: The Crystal Shards (2000), Kirby and the Rainbow Curse (2015), Kirby Planet Robobot (2016), and Kirby Battle Royale (2018).