MegaBug

The Mega Dragon is the bigger bad of Mario+Rabbids Kingdom Battle and arguably the main antagonist of the game.

Appearance
While in its regular form, The Mega Dragon looks very strange, it has yellow-brown-red molten wings and a small head with the same color.

When it fused with Bowser, it created the "Mega Dragon Bowser", and it now has a molten pattern on it's body along with red eyes, and it keeps the red wings.