craftgrrl | knitting pattern for a sweater for a 5 year old.Help!

Im looking for a knitting pattern for a sweater for a 5 year old boy . Hes a big kid around an 8 size and tall for his age soo I guess Im looking for something around that size.
BUT......It has to be cool. Scary monsters ,dragons ,vampires,pirates,skulls,punk rock . Something that makes him go AWESOME and then wear it.(even if one arm is longer than the other)

I suck big time at making patterns that are regular size for small people fyi
I have no problem buying anything especially a pattern book,in fact Id rather since hell probably be in college by the time Im done.

THANKS SO MUCH !

*and if this isnt where I should post this let me know