- For a list of Big Boy robos, see here.
Big Boy (Fatty Vice in Japan) is a class of robo renamed from the Funky Big Head class beginning in Custom Robo Arena. Big Boys may move fairly slow on ground, but their jump distance allows them uncontested approachability from air. These models are useful because of their high defense and air mobility which allows for juking midjump. They are most effective when using mid-range or long-range weapons. Big Boys are typically named after hydrocarbons.