Wacky fantheory I just came across on a /v/ thread
>When the ancients arrived into "Kirby's" universe, which held the power of harnessing dreams and imagination, the ancients' children with the most powerful imaginations took control, and turned themselves into gods, knights, kings, fairies, or just plain artists (who still held the power to turn their art to reality because that's what kid artists would want)
>The normal adults turned into boring Waddle Dees, while bad people or bad thoughts or whatever manifested as the villains you see in the series
Makes zero sense when you think further about it, but it's fun to think about