Kablooie Duck is the non canon 5th Triplet of Della Duck. I headcanon that the biological father of the Triplets is Daffy Duck. Kablooie Duck like his name suggests is a dangerous, violent, firey, duckling. In Disney, this makes him the bad guy working for the side of good.
In Warner Brothers, this makes him a slightly under powered, normal, duck. So after the end of Ducktales, Della sends her son to live with his dad so he doesn't hurt anyone. Unfortunately, Kablooie Duck entered the picture just when they needed a replacement for Elymra Duff and turns out liking rabbits runs in the family.
... This supposed to be a Sitcom rom com, in case you were confused.