I am only want to ask that why don't you try to make a beyblade in the basis of both metal series and plastic beyblade.
Besides TigerChopsticks' point, we also unfortunately cannot create any Beyblades : we are a fan-run organisation and we are not affiliated with any of the official Beyblade companies such as TAKARA-TOMY and Hasbro. You would have to take your request up to them, but usually they do not accept outsiders' input for ideas.