I wonder why Dr. Gero gave himself the body of one of his weaker versions of android bodies. Couldn't he make himself a cybernetic type like 17/18? I assume his computer could do it for him if he can't directly perform on himself, since it could handle 13, 14, 15 and Cell. Or, if not that, attach his brain to a 16 type robot instead of the weaker power-absorbing type.