Kracko is a cloud-like boss from the "Video Game Ideas Pack" he is found in the biome in popstar:
Greens Greens. He has 5000 HP and deals alot of damage
Falling Stars: Kracko causes big and medium stars to fall from the sky.
Spinning Stars: Kracko lands into the ground and spawns 10 spining stars around him and then he will chase you for 60 seconds.
Waddle Dee: Kracko will shoot 5-6 waddle doos at you.
Lightning: Kracko will shoot lightning at you.
Trying to hit kracko with a sword is useless when he starts shooting waddle doos hit it and pick them up and throw it at kracko it does 50 damage.