Marbles is one of Snoopy' s brothers and is reportedly the smartest one in the family. Marbles' main feature is his spotted ears. In his first appearance in the strip he is also depicted as wearing shoes. Marbles was mentioned by name on September 24, 1982 but appearance on September 28, 1982. Unlike Belle and Spike who shared imaginary World War I adventures with Snoopy in other strips, Marbles is unwilling to participate in the fantasy.