>>724676010
I'm a Duck main, I can give you a detailed answer.
His gameplay is fun and unique in every game he's in. He's fast and extremely deadly in the right hands. You can get in and away and basically control every matchup, despite him playing differently in every game you have different options and it all flows fluidly. Plus the Break Spiral is one of the best supers of all time imo.
He's got several cool designs, and his personality that shines through his entire moveset is fun even though he's a bit goofy. His pet chicks are cute. In lore he's one of Terry's best friends. His theme songs are top tier. He's voiced by the same guy as Geese. Overall everything about his design is appealing.
If I'm gonna be honest with you, I'm surprised Duck King isn't more popular than he is.