Spike

From Peanuts Wiki

Spike is Snoopy's brother who appears more frequently than any other of Snoopy's siblings in Peanuts. Spike lives in Needles, California and is seen in a mustache and a hat. He is usually by himself although he occasionally visits Snoopy. Spike often talks to his best friend, who is also a cactus. He was once owned by Rerun, but was became overwieght and sent back to Needles, California in 'I Want A Dog for Christmas Charlie Brown'.