Pint'oulu is one of the 18 lohans. "To be a zombie for a tiger" is a Chinese saying broadly used for someone who helps a villain to do evil. (Chuang Po-ho / tr. by Peter Eberly)
而賓頭盧則是十八羅漢之一；羅漢具有超人力量，能降龍伏虎，所以故事中暗示他是一位間接的救星。