It's worth noting that if you're running Adamant over Jolly, then Raticate's speed is only equivalent to that of a speed natured base 84. In other words, it's slower than standard Heracross. You generally want to go Jolly with Raticate since speed is its main advantage over Ursaring, who runs a similar set but with more power and bulk.Nature: Adamant (+ATK, -SATK) or Jolly (+SPE,- SATK)
Raticate only clocks in at a base 97 SPE, which while surprisingly good, means that Raticate is prone to being revenge killed by anything with Priority or a Choice Scarf. Sucker Punch can alleviate some of these pains, but requires good prediction as a misclick just drives down the burn timer.