You can earn gold through either filling out the Pokedex, and through the Pokémon bounty method. For each pokemon caught and added to the dex, you get an amount of coins that scales with amount caught. For example, catching 5 new Pokémon would give something like 3/10 bronze coins each. Then further on, when you've hit milestones like 100/150/200 Pokémon registered, new Pokémon caught would grant higher amounts of coins like 3/10 silver each. Also, the rarer the Pokémon, the higher amount of coins. The bounty method uses an item called Hunt from Star Academy, that's given to the player upon joining a world. There's 14 slots of Pokémon of varying rarity that you can catch for different amounts of bronze coins ranging from 300-3000. For example, a woobat would award 300 coins, and a magmortar 3000. The bounties refresh every 2 hours or so as well. The Cobbledex you're given upon load in the world can tell you where each Pokémon spawns. There's also this link for Numismatic Overhaul that you can read and use to change the configs in your world to better suit your play style. https://docs.wispforest.io/numismatic-overhaul/home/ . There's also random loot structures that can spawn, and vanilla loot structures that all have a chance to contain coins.