Bass, Baritone, & Guitar through Bass Amp

Does anyone know the results of shoving the 3 instruments I mentioned into a bass amp? Say Rumble 500 if I run a regular guitar through it would it pack the caliber of a 500w guitar amp? Or more like a 20w guitar amp? What happens when you run a Fender Bass VI through a bass amp? Does it thump just like a bass or is it more like a guitar?