Snap, Crackle and Pop are the cartoon mascots of Kellogg's breakfast cereal Rice Krispies. The three elf characters were originally designed by illustrator Vernon Grant and made their debut in 1933. The names of the elves are derived from the sounds the cereal makes when milk is poured on it. In the United States and Canada, opinion varies concerning Crackle's occupation, but Snap is always portrayed as a baker and Pop as a marching band leader.
Snap, Crackle and Pop appear in the episode "Attack of Evil Aya" along with many of the Kelloggs and Milton Brand cereal mascots. Their personalities are similar to their occupations in the Canadian commercials of the Kelloggs brand. Crackle (voice of Jim Cummings) is portrayed as a stressedful worrywart, Snap (voice of Tom Kenny) is portrayed as a careless confused son of a gun and Pop (voice of Frank Welker) is portrayed as a forgetful lovable oaf. Crackle was the hire of Toucan Sam to shoot Ben, even though he refuses. Most of the Rice Krispies characters use Pop's catchphrase "Why, where, who, what, when, why?" or "Whey, where, how? WHEN?!".
Their singing talents are revealed in "Anime Awards" which parodies the Canadian "Singing with the Bars" commercials where Snap is a rock-and-roll singer, Crackle is a soft-music singer and Pop is a rapper.