Swoobat needs an evolution. I see a Grass/Fire evolution for Maractus. A cactus on fire, lol. Throh and Sawk both need a pre-evo, and a yellow version would be cool. Alomomola could get a pre-evo, and definitely Basculin. I want a swordfish.
That swordfish idea for Basculin is great!
And I agree that Throh and Sawk could use a Tyrogue-esque pre-evo.
Also, as have been stated, Heatmor and Druddigon pre-evos.
An Emolga evo would be cool but I can't imagine how they'd pull it off. Plusle/Minun/Pachirisu aren't really necessary considering Pichu/Pikachu/Raichu, and for the same reason, I feel that an Emolga evo would just look like a fling Raichu...Flychu? =b