From Pixelmon Wiki
An Amulet Coin is a held item that doubles the amount of PokéDollars that are gained after defeating an NPC Trainer. It will only take effect if the Amulet Coin's holder enters the battle. It can be obtained as a tier 2 special drop. It is a possible drop from epic boss Pokémon, and from wild Meowth.
Main article: Drops
Amulet Coin used to have the following crafting recipe, which is no longer working. It was removed due to many held items being far too easy to make.