Cacturne

With tasty attacking stats and access to both Swords Dance and Nasty Plot, Cacturne might seem like a very potent sweeper. Alas though, poor Cacturne is let down by its lousy Speed stat, and its substandard defensive stats don't exactly help overcome its problem. That said, Cacturne hasn't only pulled short straws; boasting the craved move Spikes in its arsenal of moves, Cacturne has the ability to fill the role of an offensive Spiker. With access to STAB Sucker Punch, it can also bypass its terrible Speed stat to an extent, making Swords Dance a viable way to clean through offensive teams after Pokemon that resist Dark are out of the way. Its typing and ability also provide immunities to Psychic- and Water-type moves, allowing it to set up Spikes and Swords Dance much more easily.