i've hearing some of you guys say that we haven't met any vastodores. it is as follows:
Menos grande: the big hollow ichigo fought
Ajukaru: Yami, the arankar ichigo cut his arm off. stronger than menos grande
Vastorode: Ulquiola , final class stronger than menos and ajukaru.
After having taking off their mask they are now known as arankar. any hollow who takes off their mask will become an arankar