4. Kricketot
Another extremely weak pokemon, Kricketot debuted in generation IV. It has the dubious honor of being the weakest of all bug pokemon, which is saying something, considering bug pokemon are generally weak to begin with. On the other hand, both the damaging moves it learns while leveling actually get a STAB bonus, and have rather interesting effects. Struggle Bug lowers the enemy's special attack while Bug Bite eats the enemy's berry while not doing very shabby damage. Still, it just makes me imagine the poor guy as a cockroach who does nothing but struggle to get back on its feet, flailing around doing some damage and biting stuff every once in a while.