King Dedede

King Dedede is the greedy self-proclaimed king of Popstar and Kirby's arch enemy. Though the two have clashed many times, they have worked together to fight against big threats.

Pre Mecha Sonic Saga
Before the events of the Mecha Sonic Saga, Marx sent Kirby to find Galactic Nova in order to stop the Sun and Moon from fighting. Kirby realized too late that Marx sent him to Nova so he can make a wish for himself: to destroy the world of Popstar. Marx knocked kirby away, though was recovered by Meta Knight. As Marx witnessed the destruction of Popstar, King Dedede himself attempted to defeat Marx. However, Marx's strength was superior to Dedede and as a result, murdered the greedy king.