Your animation skills look quite impressive! Compared to many, many other stick fights done in a similar fashion, this one is amongst the really good ones, since I just see so many of them being lazily made, with not much effort and effect on the viewer at all.
The motion is quite smooth and I really liked the dialogue between those two at the end, and how red went full on savage with that attack from the back :D That was a good element too.
I'd recommend working a bit more on the look itself, maybe making the stickmen and the background look more detailed by adding some subtle shadows/gradients/more decorations or whatever and if you're planning on doing another fight similar to this one, it'd be cool to see some lasers/explosions/magic etc. for more spicy action! :^)
Keep up the good job! (: