It was about a guy who was an alien who was on Earth I believe and he had some sort of robot that floated around and followed him. He was I believe exiled to Earth. This had to be late 80's early 90's. I can barely remember it but if anyone has any ideas let me know. Thanks.

Is it "Hard Time On Planet Earth," maybe?

I think it might be Zax & the alien prince. It only lasted one season but i never forgot it. I found out what it was called on this forum, anyway hope that's the right answer.