Porygon-Z, of course! Its only the most awesometastic Normal-type ever. Its a virtual duck thats been created illegally, and its gone insane ever since it evolved from a Porygon 2. Not only is it interesting, but its design is outstanding. Its erratic and cool at the same time.
Not to mention this thing is pretty damn strong. Download and Adaptability are two great abilities that make it hit even harder on the special side then it already did. I personally prefer Download; its a bit riskier, but it benefits more than just Tri Attack. I used one of these guys in Soul Silver as my only special attacker, and it really did its job well.
Its a bit lacking in the Speed department, but this can be patched up with Agility, a Choice Scarf, or a teammates Tailwind. Its also frail, but hey, what sweeper isnt?
Least favorite Normal-type:
Its Stantler. Dont get me wrong, I dont hate this thing with a burning passion....I just strongly dislike its design. That giant tail just strikes me as unattractive, its very plain, its ugly, etc.
....but I have used one. It has Frisk, which, in game is a somewhat useful ability. I used one in Soul Silver to steal items from Pokemon using Thief. It actually did its job well. It got me a bunch of Heart Scales among other things. But thats the limit of the respect this Pokemon gets from me....still plan to replace it with Frisk Banette as soon as possible.