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can you teach me how to draw portaits like that because it's so well done

I don't personally teach about pixel art but i can give you some pointers.
The NT style has big thick outlines and lots of anti-aliasing, if you're not experienced in actual pixel art then a great starting point would be "Pixel logic" by Michafrar .
Or if you want a free guide check out this pixel joint forum thread .
Saint11 also has a great collection of tutorials . Good luck!

thanks i am good at pixel art and i want to get better so thanks for helping me