As you progress in Coromon, you will discover new Coromon to catch, characters to meet, and items to find. These can be found inside chests all over the world of Coromon. You can even find gold chests like the one in the R&D Lab. This may leave you wondering how to open the gold chest from the R&D Lab in Coromon.
To open the gold chest, you need to use the Push Module for your gauntlet. You must use this Push function on the machine in the lab in the top-left corner. When you score 100, the chest will open. This is RNG-based, so keep trying until you get it.
How to get the Push Module in Coromon
To get the Push Module in Coromon, simply follow the main storyline. You are tasked to find the Blacksmith in Hayville, Perrin. Perrin will take your gauntlet to add the Titan Essence Extractor and will also add the Push Module.
With this new function, you can push objects, such as logs, out of your way to clear the path. You can also use it to activate the machine in the R&D Lab and open the gold chest located there.
For more information on Coromon, check out Does Coromon support crossplay? and Are there double battles in Coromon? on Pro Game Guides.