Why is Metroid named Metroid when it is a game about a parasitic life-sucking organism that stars a female character? Simple it is just a title, no more than the Legend of Zelda is a title.

Which game are you using Link from? In each game his age and equipment is different so that needs to be defined to some degree, unless you just want me to go through a basic rundown of all of it, which I would rather not do, but can do. Also I need to know who Grahf is, and what he can do to make a clearer judgement on how this battle would turn out.