There are five different types of elemental strengths, each with its own elemental weaknes: Fire: Strong against Wood; Water: Strong against Fire; Wood: Strong against Water; Light: Strong against Dark; Dark: Strong against Light.

Always prepare your team around what you're going to face the most.

Tapping on the tree that glows on your ship will give you free gold and a random reward.

Completing the fourth mission in each chapter will reward you with an increasing amount of astrogems.

Completing certain capture quests, daily quests, and challenges will reward you with a decent amount of astrogems. Clearing all of the Weekly quests will grant you the 100% Clear Reward which is a bunch of astro gems.

Be sure to check the Astroguide every time you capture a new astromon. For every new never before seen astromon you catch, you'll earn free astrogems. You get more astrogems for each evolution stage!

Completing missions and quests like usual will reward you with piles of gold. Finish all of your daily quests before they reset, as the 100% Clear Reward is 30,000 gold!

Selling extra gems you don't need is a good way to generate some extra income. It's not much, but gems aren't too rare and you'll be finding a lot of them as you battle through the later levels.

Every five levels (every 10 after you hit level 30) you can go into the “Special Package” menu and collect level-up gifts, which are just a bunch of gold piles. They start out at 50,000 then eventually build up to 400,000!

Add friends! You can send friends small amounts of gold. If you have a full friends list, it's a lot of gold! As an added bonus, after you've sent gold to a friend five times, you can send them an astrogem!

You can also exchange astrogems for gold.