In that case, here’s an add-on for other bot types; there are also Drones ( e.g.: firefighter ) but those require Androids and a bunch of batteries for power. In 1.4, Drones needed batteries until they could automatically recharge by tapping into various electronics; should still be the same in 1.6.
One of my custom scenarios is a “Roomba Lord” – one of those Androids with several Roombas and Drones.