Who are stanleys friends in holes?

In "Holes" by Louis Sachar, Stanley Yelnats befriends several characters at Camp Green Lake, including Zero (Hector Zeroni), who becomes his closest friend. Other notable friends include Armpit (Theodore), Squid (Kevin), and X-Ray (Rex), who are fellow campers. Despite their initial differences, these friendships develop as they face challenges together, particularly in their shared struggles at the camp.