Dive Ball
From Pixelmon Wiki
A Dive Ball is a somewhat different Poké Ball that has a 3.5× catch rate on Pokémon that are in water. It can be obtained by crafting it, buying from a shopkeeper, or as a tier 1 special drop,
Crafting
To craft a Dive Ball, a Dive Ball lid, a button, and an iron base or aluminum base are needed.
To craft a Dive Ball lid, two cooked Blue Apricorns and one cooked Pink Apricorn are needed. Placing the three cooked Apricorns in a row horizontally in a crafting table, with the pink one in the middle, will produce three Dive Ball discs, and then using them with an anvil and a hammer will make them into Dive Ball lids.