Give it a go yourself! Here are the steps...
Start with the eyes
Couple of ovals with some coloured circles inside
Add a nose
Under the eyes, draw another circle with 2 more circles for nostrils
Draw a massive mouth
Don't forget to fill it with those all important gnashers - for gnashing!
Add some eyebrows
Play around with where they are to give Gnasher some epic expressions
He doesn't have long whiskers like some stinky cat - just some dots either side of his nose will do!
Outline his face
Draw an outline around his face - the top bit looks a bit like a bum! Ha-ha!
Give him some hair
Draw huge curved spikes all around his face and colour them in - be as messy as you like here!
Finally colour his face!
And you got yourself a very gnice Gnasher!