Daffy Duck: The zany and wacky Daffy made his cartoon debut in the 1937 short titled 'Porky's Duck Hunt'. The cartoon, which is originally one of the shorts featuring prominent Looney Tunes star Porky Pig happened to feature Daffy Duck as a supporting character who would pester Porky throughout the episode with several popular sight gags and jokes.

A still from Daffy Duck's debut short, 'Porky's Duck Hunt' (1937). Pic/Dailymotion

'Porky's Duck Hunt' became extremely popular with viewers and made Daffy Duck a household name over the years. Interestingly he wasn't named until the 1940 short 'Elmer's Candid Camera'. The cartoon was also notable for being the first short in which legendary voice-over artist Mel Blanc voiced both Daffy and Porky. '

Bugs Bunny: Any cartoon lover would jump with joy upon hearing the popular catchphrase, "What's Up Doc?" as it would conjure memories of cartoon shorts featuring Bugs Bunny asking this questions to cartoon villains like Elmer Fudd or Yosemite Sam while chewing on the carrot, an image which is etched in popular culture.