Double post fact time!
There is a frog that can have claws. They are not usual claws though - the frog breaks its foot bones, and punctures the skin, using the bones as claws.
Double post fact time!
In Zelda Ocarina of Time, a small easter egg is seen in Zelda's courtyard - one of two windows has pictures of characters from Mario in there. If you shoot your slingshot at the window, you'll gain 20 rupees.