A Heavy Ball is a Poké Ball for catching very heavy Pokémon.
The catch rate modifier that a Heavy Ball based on Pokémon weight is as follows:
- <451.5 lbs/204.8 kg: -20
- Between 451.5 lbs/204.8 kg and 677.3 lbs/307.2 kg: +20
- Between 677.3 lbs/307.2 kg and 903 lbs/409.6 kg: +30
- >903 lbs/409.6 kg: +40
A list of Pokémon that have an increased catch rate with a Heavy Ball can be found here.
To make a heavy ball lid, three blue cooked apricorns are needed. Placing the three cooked apricorns in a row horizontally in a crafting bench will make three Heavy Ball Discs, then using the anvil will make them into heavy ball lids.