Because birds and other flying creatures eat insects.
Grass and I think bug not sure
they r weak against fire, flying, poison, bug and ice
Shroomish due to it being a Grass-type is weak against Ice, Fire, Bug and Flying-type attacks.
Rock and ground. Flying, water and sometimes bug Pokemon are weak against it.
Caterpie is a bug Pokemon, so it's weak to Fire, Flying, and Rock type attacks.
Bug type Pokemon are weak against Fire, Fighting, and Flying. Not fighting there not weak against fighting types, there weak against Fire, Flying and Rock.
It is weak to fire, flying, and bug.
Fighting, Grass, and Bug types are "weak against" flying types in all games.
The Pokemon that are weak to bug Pokemon are Pokemon that are the grass, poison, or psychic type.
fire,flying,etc... good luck!
Grass and I think bug not sure
they r weak against fire, flying, poison, bug and ice
In Generation I, Bug Pokemon were weak to Fire, Flying, Poison and Rock types. In Generation II and onward, they are weak to Fire, Flying and Rock types.Bug Pokemon are resistant against Fighting, Grass and Ground types in all generations.
Bug Pokemon are weak against: Fire type moves, Rock Type moves and Flying Type moves.
Grass, Bug, and Fighting-type Pokemon are weak against Flying-type moves, which causes it to receive double the damage from Flying-types.
In Pokémon SoulSilver, the weaknesses of the Elite 4 are as follows: Will's Xatu is weak to Ghost and Electric attacks. Jynx is weak to Ghsot and Fire attacks. Exeggutor is weak to Flying, Bug and Fire attacks. Slowbro is weak to ghost, grass and Electric attacks. Koga's Ariados is weak to Fire and Flying attacks. His Venomoth is weak to Electric attacks, Forretress is weak to Fire attacks, Muk is weak to Psychic and Ground attacks and his Crobat is weak to Psychic and Electric attacks. Bruno's Hitmontop, Hitmonlee, Hitmonchan and Machamp are all weak to Psychic and Flying attacks. His Onix is weak to Fighting, Grass, Steel and Water attacks. Karen's Umbreon is weak to bug or Fighting attacks. Her Vileplume is weak to Bug, Fire or Flying attacks. Gengar is weak to Ghost, Dark or Psychic attacks. Murkrow is weak to Electric attacks. Her Houndoom is weak to Fighting or Water attacks.
Shroomish due to it being a Grass-type is weak against Ice, Fire, Bug and Flying-type attacks.