Sure! Here's a simple implementation of a Battle Royale game using JavaScript and HTML. Please note that due to the limited capabilities of plain text-based communication, the graphics might not be as visual as you expect. Also, keep in mind that implementing a full-fledged game with high-quality graphics can be complex, so this is just a basic example:
In this game, you start with 20 different heroes represented by their names. Each hero has an initial number of trophies set to 0. When you click on a hero, it battles against a randomly selected opponent from the available heroes. The battle is simulated using randomization, and the winner earns 10 trophies while the loser loses 5 trophies. The game output is shown in the browser console.
Please note that this is a very basic implementation of a Battle Royale game, and it lacks sophisticated graphics and gameplay mechanics. It can be expanded upon to include more features based on your requirements.