Let’s see…

Thanos with the Infinity Stones can eradicate half of all life in the universe with a snap of his fingers, not even caring who dies in the process as he wants to control the population in case it gets out of hand and gets into wars with each other.

Shaggy’s powers levels are over 9000.

Galeem is the Lord of Light and Order, and Dharkon is the Lord of Darkness and Chaos, making them powerful enough to command armies of Master and Crazy Hands and wiping out ALL life in the universe, no matter how powerful (unless some were to survive like our boi Kirby), and capturing warriors to turn them into their servants and use them for cloning vessels for the spirits they’ve created out of the bodies they’ve disintegrated.

Sounds like a pretty good Death Battle, if you ask me…