Franchise: Kirby

For the "Kirby: Right Back at Ya!" 3D episode on the Nintendo 3DS, most of original cast members were brought back to reprise their roles. The only exceptions were Maddie Blaustein, who didn't return to voice Chef Kawasaki as she passed away in 2008, and Andrew Rannels, who didn't return to voice Nightmare as he had a busy career on Broadway.

While most abilities got hats in Kirby Super Star, the Hammer ability didn't get one. The current hat seen today first appeared in the Kirby anime, with some minor tweaks.

Lololo and Lalala, two recurring bosses throughout the series starting with Kirby's Dream Land, are actually Lolo and Lala from Eggerland/Adventures of Lolo. Both Kirby and Eggerland were developed by HAL Laboratory.

In a released concept art in Kirby's Dream Collection, an unknown knight was shown with red butterfly-like wings. Since this artwork was in Meta Knight’s section, many presumed it to be Meta Knight's beta design. However, in a Nintendo Dream magazine interview with Shinya Kumazaki, he confirmed that the design was originally for an entirely different knight that would have appeared in the cancelled Kirby GameCube game. This design would later be used for Morpho Knight in Kirby Star Allies, ​​​​except with a different sword.

A prequel to the Kirby series titled "Kid Kirby" was being developed for the SNES by DMA Design, now Rockstar North. The game was a platformer featuring a younger Kirby which would've utilized the SNES Mouse peripheral, however the game was canceled supposedly due to the mouse not selling well.