With his pet dog Henry, he caused havoc around town, the outcome of which would usually involve being caught by his parents and punished with the slipper.
The early 1980s saw Graham Exton become the writer, and in 1984 (issue dated 7 April) Sweeny became the cover star of Whoopee!
Before the demise of Whizzer and Chips, Tom Paterson left Fleetway in favour of DC Thomson.
As with several other Buster strips, it was included on the last page of the final issue (How It All Ends), drawn by Jack Edward Oliver.
In 2021, Rebellion Publishing announced that they would be reviving Monster Fun, and that Sweeeny Toddler would be included in the new issues.