This show may take place in a computer.
Think about it. They are designed like they are in-game in the 1980s, and would have some references about the era. It also has fashion in the era, too.Roba was in a bad accident.
Something bad happened to Roba, and he had to become a cyborg, making him scared of the outside world.Alfe is a Disgustoid.
Alfe came from the sewers, an area where the Disgustoids from Secret Mountain Fort Awesome came from. He's also ugly looking and has gross and crude behaviors and he lives in a world where humans are even uglier just like the Disgustoids do.