I love your technique that you applied on the drawing. I could tell that so much work has been put into this and I encourage you to continue and be better at what you do. I hope the best for you and for you to reach also it would be amazing if you tagged pewdiepie to this picture so he can put it on his videos. Thank you for making such an amazing art work. I personally have to say the shading looks fitting and matches out with the whole theme. Even the duck looks simply amazing and delicate in my view.
I have to say I really like this picture. The hair colouring is perfect als always and the folds in pewdies clothes are also very realistic. I also really like the colouring of the duck. Esspecially in the face. But I would have made the beak a bit longer, and the duck has a little kink on its throat. It's not bad, just wanted to mention it. Pewdies clavicle looks a bit flat maybe you should bring a bit more depth into it. The last thing I want to mention is Pewds right eye (from his perspective). It looks a bit weird. Too flat and too 2D for the rest of the drawing. I can't really say what excactly is wrong with it but it gets a bit in the way with the rest of this awesome drawing! Hope I don't annoy anyone with my little mistake spotting. Keep up this cool work and draw more ducks! (or Cry with his cat)