10 to 12 lollipop sticks or other wooden or plastic skewers or sticks
Put the ancho and coconut in an electric spice grinder and pulse until ground. (You don't want it too fine; a tiny bit coarse is great.) Combine this mixture with the lime zest and sugar in a bowl and toss to combine.
Cut an end from 1 mango so it sits straight. Use a sharp knife to cut down and peel off the skin. Cut the flesh from the mango in planks, getting as close to the pit as you can. Cut the planks into wide pieces (you'll get 5 to 6 pieces out of 1 mango). Repeat with the remaining mango to get 10 to 12 pieces total.
Stick a lollipop stick in each piece of mango and sprinkle them all over with the coconut-chile mixture. Sprinkle lightly with the flaky salt and serve.