This is a kind of an RPG party challenge.
Create two character sprites - one of Sherlock Holmes and one of Dr. Watson. Chose two elements and use each of them as a theme for each character. Yes, they can be elemental monsters, but they can also have only elemental themed outfits, or be magicians of different element magic. What kind of characters you draw, and how you interprete their elemental nature is entirely open to your interpretation. The only thing not debatable is that both characters have to be indefiable, and the usage of chosen elements recognisable. If you convincingly pass those criteria by drawing a frog and a stone - even better.
You have to use the Murder Mystery 16 palette by Toby_Yasha.
Canvas size: Exactly 221x221.
Colours: Max 17 (palette + transparency).
Transparency: Required.
Animation: No.