I personally like it as a pokemon, but not as a mythical. From what we know of it, it's more of a Oranguru/Passimian type pokemon which lives with others in forests rather than something actually mythical.
Otherwise, I quite like the facial markings - they're very effective at making it look evil and work well with the black colouring. I also think it looks pretty good on all fours (when it is bipedal though, it just looks uncomfortable).