In Tenchu:Wrath of Heaven, there are certain swords the character's need to kill the undead, but the consequence is that it drains the wielder's health. To get health back, you have to kill people or the undead with it.
The Cheerleaders are a different idea. Not something you'd see in another rpg. Unless you'd count 'The Adoring Fan' from Oblivion, but he's only good for knocking of the highest cliff.
:D