Plusle

A pretty unassuming specimen at first glance, Plusle is actually one of the most threatening Pokemon in the NU tier, largely due to the fact that it's one of only three usable Electric-types available and the best one of the bunch. Directly outclassing Minun offensively and packing more Speed than Pikachu makes Plusle the dominant Electric-type. While it has little in the way of offensive coverage apart from its STAB moves and Hidden Power Ice and Grass, it doesn't really need the coverage to blast apart the opposition. It sits atop its throne as one of the best revenge killers and late-game sweepers available, a much-needed check to the Flying-types and sweepers like Huntail, and basically the cutest threat there is.