 Unlike other Tom and Jerry characters, this one is not a character "per se", but rather a substitution for a character, such as Spike the bulldog, for a brief visual gag.Usually, a character turns into a jackass when it is fooled such as Spike in "Solid Serenade" (1946), "The Framed Cat" (1950) and "Pet Peeve" (1954) or Tom in "Polka Dot Puss" (1949).In "Pup on a Picnic" (1955), the word 'Sucker' is used instead of 'Jackass'.