First off, I really like your color choices and expressions. You did a really good job in that.
But, I feel that you could make it a bit neater; I feel like it has been rushed almost. First off, your lineart doesn't seem to touch each other and I feel it gives this piece a rather unclean look. So, I would probably connect those lines to each other. Also, I would pay attention the "solidifying" the coloring a bit more for your figures so the background color doesn't show through them. If you do, then the piece would be tidier. Speaking of background, it seems a bit too scribbly for my liking so may I suggest putting the lines facing downward left? By having that, it will make your piece more dynamic. Furthermore, Zorua and Sandile seem to have abnormally large forearms and it doesn't seem natural to me so maybe shorten them a bit. Finally, your lineart in generally could use work and I would pay attention to line overlaps (i.e. I see some here) and take your time to erase them if you find any because if you leave them, they will make your pieces unclean.
Hope this helps and as for the Uber Stall, I shall work on that ASAP! :)