What is the name of the penguin-like antagonist in Kirby games?

The penguin-like antagonist in Kirby games is King Dedede. He is a recurring rival who first appeared in Kirby’s Dream Land in 1992, where he stole Dream Land’s food supply and provoked Kirby into confronting him.

King Dedede is recognizable by his blue body, red-and-yellow royal clothing, white fur trim, and oversized wooden hammer. Although he is frequently introduced as an antagonist, he is not consistently evil. In several stories he helps Kirby fight a greater threat, and later games portray him as an antihero, ally, or playable character.

His role in Kirby’s Adventure illustrates that complexity. Dedede breaks the Star Rod into seven pieces, apparently causing trouble for Dream Land, but he is actually trying to keep the villain Nightmare sealed away. Marx is a separate character, Waddle Dee is a species and recurring ally, and Meta Knight is another masked rival. None of those characters is the series’ recurring penguin king.