The frog is a minor character in The Backyardigans.
The frog is the subject of the book "Spot the Frog". Wizards Uniqua, Pablo, and Tyrone catch him and try to turn him into a dog. They successfully accomplish this, but the frog still makes croaking sounds in its dog form.
The frog is light green with darker green spots and a yellow underside. It has webbed feet and yellow eyes with black pupils. After the frog is turned into a dog, it has light brown fur.
The frog has not appeared in any episodes of The Backyardigans, but can be seen in the book "Spot the Frog".