Minun

There's little reason to use Minun when Plusle and Pikachu are in the tier. Offensively, Minun is outclassed by both; however, in a support role, Minun is usually the better choice. Fortunately for Minun, its support movepool is pretty expansive, and while it's outclassed by Plusle offensively, it's still offensively threatening in its own right. The real question to consider is: why choose Minun over other support Pokemon in the tier, particularly much more defensive options like Kecleon and Swalot? The answer should be its incredible base 95 Speed and the fact it has Electric-type STAB moves to revenge kill the likes of very dangerous Pokemon like Pidgeot and Murkrow. Either that or because it's significantly cuter than the other options.