A Dive Ball is a somewhat different Poké Ball that has a 3.5x catch rate on Pokémon that live in water.
Crafting
To craft a Dive Ball, a Dive Ball Lid, a Button, and an Iron Base are needed.
To craft a Dive Ball Lid, two blue cooked Apricorns and one pink cooked Apricorn are needed. Placing the three cooked Apricorns in a row horizontally in a crafting bench, with the pink one in the middle, will produce three Dive Ball Discs, and then using the anvil will make them into Dive Ball Lids.