[@Eviledd1984]

You know, stuff they can just inherently do in the game without an item. Mario can throw a fireball, Ezio can turn on eagle vision, Megaman can charge his shot. Special moves. 

It's like:

Power: Glory Kill - If Doomguy deal enough damage to an opponent to stun it and closes to melee range he can instantly, brutally kill it. Enemies killed this way always drop health pick-ups.