Raticate

Raticate stands out as the fastest unboosted attacker in the tier (not counting the irrelevant Voltorb) and is an extremely potent offensive threat on teams built with the focus of sweeping with it. Apart from its Speed, which places it just above the base 95 Speed tier occupied primarily by Plusle and Haunter, it boasts a great STAB type in Normal, decent coverage options, a great ability that can take its threat level to 11, and enough flexibility to keep its opponents on their toes the second it makes its presence known. The only major downside to bringing Raticate is that nearly every team is going to be naturally prepared for it, whether that be through the near-omnipresence of Hitmonchan in the tier or through the presence of physically bulky checks to it like Sableye and Relicanth. Regardless, Raticate's deadliness is undeniable, and it's definitely worth consideration for building a team around.