Take a sponge and use dark green to paint the shape of the helmet. Use light grey to paint the shape of the badge. Use white to paint a paw print in the badge and highlights of the hat. Take black and a brush to outline the helmet and badge.
Using a brush, take brown and paint circles around the eyes, and the outside of the ears. Take white and paint down the centre of the nose, and the bottom of the cheeks.
Take pale pink and fill in the centre of the ears. Using a brush, take black and outline the pup. Paint the nose and three dots on either side of the nose. Use white to add a highlight to the nose.