Lineart plus lock alpha done, also sketched a possible background. You may change anything you want c:
I hope you're alright with colouring and shading, I can shade extra stuff or the background later, ..add whatever you want pretty much. Also, if you want rain, we could add drops of water in their fur/under their bodies etc And you mentioned dirt before, so have fun~ (Note: I didn't add the bone at the end of Tukan's tail, since it won't be visible with the third lion in the front.)
I'm not super happy with the colouring of Tukan's armour yet, but here it is in flat colour atleast: (tweak the colours as you please) (You can find Tukan's reference here. )