Under Shirt

Under Shirt (アンダーシャツ) is a recurring ability from the Mega Man Battle Network and Mega Man Star Force series that allows the user to survive a lethal hit with 1 HP. It first appeared as a Battle Chip in Mega Man Battle Network 2. From Mega Man Battle Network 3 onward it became a Navi Customizer program. In the Mega Man Star Force series it is an Ability Wave.