Judas could not have been baptized, since he committed ѕυιcιdє before Our Lord instituted the Sacrament of Baptism. He may have received the baptism of St. John, that of repentance, but not the actual Sacrament of Baptism.
Judas had the same opportunities the patriarchs had, and baptism wasn't absolutely necessary at the time, so his was a deep seated dishonesty and perversion of soul that was his undoing. Perhaps avoidance of the baptism of John was the beginning of it.