Nope. Nowhere near overnight, in my land. In fact, I almost got late to school =)
Anyway... that is a tricky character you've got there. The amount of reliable resources is very little.
Either one of the two renders ahead could fit with the background used
here or in a similar one. (Seriously, it is painful to chase down backgrounds.)
There's also this Chibi render which I could modify to fit the style used in the Chibi Luka sigbar.
By the way... there's also the border issue. Keep in mind, though, that a custom border multiplies the demanded time.