The Adventures of Blinky Bill S02 E20 Blinky Bill and the Crocodiles

"Following the destruction of their village by loggers, a young koala and his friends help to rebuild anyway they can."

On the trip back to Greenpatch, Blinky and his friends are met by a crocodile called Sirol who was exiled by his father for being soft. Blinky's gang train and disguise Sirol for the Iron Croc Contest. Sirol gets past every course resulting as the winner and earning good reputation from his family.