Tough week for six suspected criminals, each of whom faced a Vista judge for arraignment Monday in three unrelated but bungled crimes in North County recently.One suspect left his wallet behind during a holdup. Another is accused of robbing three people at gunpoint less than 200 feet from his home; moments later, police found him standing in his front yard with a loaded shotgun and ski mask.Two other suspects were accused of breaking into an Oceanside home where, it turned out, the resident fended them off using his martial arts skills. And the remaining two suspects were in the getaway car, which crashed during the ensuing police chase