'Vader is an enemy from Battletoads.
Details[]
Based on the Crab Invaders from Space Invaders, the 'Vaders break the fourth wall and attack the player's health bar directly, stealing one block of health and attempting to get away with it. They can be hit as they try to leave the screen, though the player still has to recover the stolen health block afterwards.
Gallery[]
Battletoads (NES)
Battletoads (Mega Drive)