Joker first appeared in Knockout issue 1 (series 2) on 12 June 1971. Knockout merged with Whizzer and Chips in 1973. Joker stayed in Whizzer and Chips as a Whizz-kid until the end, when he continued in Buster until the close of the comic on 4 January 2000. The strip was written by Malcolm Morrison, and illustrated by Sid Burgon.

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