Monsters Rush contains a large number of Pokemon that are all charming and colorful. They come in a variety of sizes and styles. After being gathered, monsters will always follow you. Pay carefully and pass through the blue portals to level up and strengthen your Pokemon. Avoid the red doorway at all costs, as it will weaken your monster.
At the end of the path, you will come upon an antagonist and his army of monsters. In combat between the two teams' monsters, the stronger will win. If you're stronger, you'll get more perks. Sometimes the impediment in your path is not an adversary but rather a treasure chest with gems that you can pilfer.