I have fought King Dedede in multiple games, but I have never defeated him until recently in the original title.
Which takes place in a boxing ring of all places. But now, his final smash in Super Smash Brothers Ultimate. makes a lot more sense.
Without any additional powers, you do have to fight him with a lot of skill and he’s actually pretty difficult to defeat. But you can kick him out of his castle.
And then Kirby turns into a hot air balloon and repossesses his house, LOL. I can see why King Dedede always held a grudge against him.