The Kirby Encyclopedia:Canonicity

The canon of a franchise is a system of classification that separates official media products from unofficial media products and official releases that are "disowned" by the right holders or not intended to actually "happen" in the fictional universe. These systems serve to determine which characters, locations, events, etc. "actually" exist in a series' fictional universe. Many franchises have official canons established by creators of the series, companies owning franchise trademarks, and other sources of authority. The main Kirby series is considered to be canon whereas several of its spinoffs, Kirby: Right Back at Ya!, and Super Smash Bros., are all considered to be non-canon. Any article that solely consists of non-canonical information should be tagged with (or   if it only applies to a specific section).

Information regarding the development of a source, such as pre-release and unused content (unused characters and other scrapped video game ideas, for example) should be appropriately documented in sections regarding the development of a video game, character, etc.

Lastly, it should be noted that, canonical or not, The Kirby Encyclopedia only covers official content as well as mainstream cameo and guest appearances. Fanon creations, which include fan fictions and fan-made games are not official non-canon, and are not to be referenced within our articles. However, one may add reasonable and popular theories within the collapsible template.