Heavy Ball

Used by a trainer in battle : Attempts to catch a wild Pokémon. If used in a trainer battle, nothing happens and the ball is lost. If the wild Pokémon weighs: * 409.6 kg (903.0 lb) or more, its catch rate is 40 more than normal. * 307.2 kg (677.3 lb) or more, its catch rate is 30 more than normal. * 204.8 kg (451.5 lb) or more, its catch rate is 20 more than normal. * less than 204.8 kg (451.5 lb), its catch rate is 20 less than normal.