Current Gen 1 Megas cover
So a Fighting, Ice, Fairy, Dark, Steel, Ground, and Electric are the ones that could use a Mega....
Also factor in some mons that don't particularly have much oomph these days...
The Hitmons (As one)
The Democratic Nintendo fan....is that a paradox? I'm fond of one of the more conservative companies in the industry, but I vote Liberally and view myself that way 90% of the time?