Froakie

Froakie's niche lies in its ability, Protean, which changes Froakie's type to match that of the move it is using. While this in itself may not seem interesting, it also provides Froakie with a STAB boost on every single attack it uses. Coupled with a usable base 62 Special Attack stat and Life Orb, Froakie hits fairly hard. To take advantage of this, Froakie has a wide array of both physical and special attacks that let it hit most targets for fairly good damage. Froakie's good Speed stat lets it hit 17 Speed, allowing it to outspeed a good portion of the metagame. However, Froakie's poor defenses force it to rely on OHKOing foes before taking any damage, which makes it very susceptible to priority, namely Fletchling's Acrobatics. Furthermore, Froakie's Speed stat, while good, still leaves it outsped by common threats such as Diglett and Gastly.