Bassballs is two filters that move in opposite directions creating a vowel/vocal effect and you can have this with or with out fuzz. My overall opinion of it is low and I would recommend looking at anything else.
There are no analog units that do a clean octave up all the others are digital and the following will do that, EHX Pog, Hog, Micro Pog, Digitech Whammy 4 (Plus previous models) that pretty much covers the mass produced units.
Spring king will do that it has the kick button for that exact purpose but doesn't seem it would be all that useful its not a great pedal for anything else