Shaggy Requiem

This Shaggy is theorized to be the highest form of Shaggy. In this form, he says that he uses 100% of his power, but many scientists are skeptical. With this power, he could even stand up against Super Ultra Mega Hyper Super Saiyan 76 Giga Penta Purple Spongebob, but he is not that powerful. He could destroy mere universes, and he has killed God before.

Origins
No one knows the origins of Shaggy, except for Shaggy himself. As far as anyone knows, Shaggy has existed for all of time, but there might have been someone before him.

Offspring
Shaggy has had millions of offspring. Shaggy is also theorized to have created god himself, and gave him 0.1% of his power. Purple Spongebob is also one of Shaggy's offspring, but Purple Spongebob was gifted with 20% of Shaggy's power. Shaggy got worried when his power multiplied by 10 fold.

Other Shaggys
All other Shaggys were created by Shaggy, or had more or less a very high connection to him. His first creation was Green Shaggy, who was one of the most powerful beings, but god took away his power. Shaggy Requeim was very angry with this, which caused him to smite God.