Tasmanian Devils do not live on the mainland of Australia, let alone in a desert.
Koalas live in woodlands, not the desert.
Meerkats live in the Kalahari Desert, where there are neither bananas nor gourds.
The kangaroo in the movie is male, yet has a pouch. Only females have pouches in reality.
To produce electricity, the dam must keep the water flowing, which will enable the gorge to have some water and not be completely dry.