Pummel Pets by GibbonGL is a roguelike monster tamer game made with GB Studio. The author has mentioned that the status of the game is still prototype and there are many features that still need to be finished. In order to download this game you must purchase it at or above the minimum price of $5 USD.
In this game, you need to collect all the 30 elemental pets. You must protect them and take care of them. Once they are grown up and strong enough, you can use them in the battle against your opponents.