Pawniard and Bisharp
I've never really talked about this pokemon before, but I actually really love Pawniard. It's such a dangerous and nasty looking little thing, almost beetle-like, with menacing blades everywhere and just the cutest spooky eyes in a face with basically no other features. Everything about this design is fun, and as a dark/steel type, you know this thing made entirely of knives is also a rat bastard.
Sadly, I just can't muster the same enthusiasm for the evolved form, Bisharp. Like many other Pokemon, all this evolution does is increase its size and decrease its charming personality. And those cursed triangle eyes return. It's actually been a pretty dang long time, triangle eyes.