Sure, here's an example of a game where you collect and fuse robots to battle others. Note that due to the limitations of text-based communication, I can only provide a simplified version of the game. Please copy the code below into a single HTML file and open it in a web browser to play the game.
Robot Fusion - Battle Game
In this game, you start with three robots represented by pictograms. You can then select a robot to battle a randomly chosen opponent. The battle results are displayed, indicating whether you win or lose. Additionally, there is a "Fuse Robots" button that allows you to fuse any two robots in your collection if they can be combined. When two robots are fused, a new robot is created and added to your collection. Enjoy collecting and battling robots!