Gentlemen, I come to you with what I feel is the most obvious missing pokemon in both typing and design.

The design is so obvious, so simple that it warrants no special mention. It would fit in easily with almost any generation.

But most importantly the typing is perhaps the most powerful in the game. I bring you the Normal/Ghost Pokemon.

It would be immune to Normal,Fighting and Ghost moves Also if given the right ability, ground moves would perhaps make it one of the more unstoppable Pokemon out there.

Any thoughts on this pokemon or any other missing ones that you feel could be added with relative ease?