This is a very good choice against Grass Pokemon Poison and its attacks both against the Bugs. But since there are so few useful Bug Pokemon in this game, you probably should play its Bug nature. Pin missile is a good technical bugs so make sure to use against Psychic, Poison or Grass types. If you happen to fight against a Beedrill, remember this is not a type of flight. Do not use electricity. Use fire, theft or attacks RockTips For Pokemon Ruby | Beedrill
This is a very good choice against Grass Pokemon Poison and its attacks both against the Bugs. But since there are so few useful Bug Pokemon in this game, you probably should play its Bug nature. Pin missile is a good technical bugs so make sure to use against Psychic, Poison or Grass types. If you happen to fight against a Beedrill, remember this is not a type of flight. Do not use electricity. Use fire, theft or attacks Rock
