Not made for sweeping, but...
Dedenne (M) @Assault Vest
Ability: Cheek Pouch
EVs: 4 HP / 252 Sp.Atk / 252 Spd
Timid / Modest Nature
- Grass Knot
- Volt Switch
Dedenne is actually a unique Pokémon (although it's design can be compared a lot often to Raichu or even Hamtaro), it's typing, providing only two weakness, sure is unique. Dedenne can't actually have that much power to sweep, but against the right opponents it can surely be annoying and even defeat one or two. Assault Vest makes it a little bulkier on the special side, which is always welcome. Thunder, besides STAB, is there due to Dedenne's lack of power and Thunderbolt suddenly not being that reliable. Nuzzle is that special attacking Thunder Wave that pairs up pretty well with Assault Vest. Grass Knot is for coverage against Ground/Rock type Pokémon who think it will be easy to get a free knock out at him. And of course, Volt Switch is excellent for a final hit and free switch out.
Overall, Dedenne isn't the greatest Pokémon, it's movepool is pretty shallow and it does miss a good Fairy STAB move, but you may see some people using and I guess it's just because of its looks. So if you want to use a Dedenne, go for it!