Your mouse, it's boring. Why should you, a unique and beautiful snowflake, us a pointer for your computer that's just like the pointers everybody else has for their computers? It's just plain criminal. You need to show off your totally-unique video game hobby to the world, and the best way to do that is with a fancy custom mouse.
Just make yourself a mouse out of an old Game Boy! I mean, really, how can you go wrong there? It combines a Game Boy, which you clearly approve of, and a mouse, which is one of those necessary peripherals to have to keep your computer functioning. The A and B buttons will act as your right and left clicks, which might not be ergonomically, but it sure is cool and unique, just like you.