In 2012 I was asked to make a set of 5 inspired by Nintendo Super Mario Bros hats: I created Luigi, Mario, Yoshi, Princess and mushroom.

Here is the pattern I created for Super Mushroom
Inspired by: Nintendo Super Mario Bros

A simple beret or tam hat.

I highly recommend:
Deadly Flower by Heidi Yates

for all things inspired by Nintendo Super Mario Bros hats