Board Thread:Questions and Answers/@comment-8824634-20130921175839/@comment-24095402-20131229000610

He is a male. But the little Kraangs (or Krangs) probably have different mothers and fathers. and all the kraangs created a large Army.

And also the reason of there only being one Krang in the 1987 series is because he was a evil alien that somehow got he skin removed and left with a brain.