Several characters have appeared in Crotoonia as easter eggs. There are no plans for them to have an official apperance in the series.


Mater is a tow truck who appeared in Tracy the Harbour Engine. He was seen in the background of one scene being lifted by one of the gantry cranes of the Port of Gridinia Bay.


Wallace appeared in the Railside Tales episode: Cheesy Livi. He appeared in one scene when Livi mentioned the word "cheese" while being bitter about the changes of the McCrakenton Freight Depot.


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