In a mixing bowl, combine the diced mango, red onion, jalapeño, cilantro, lime juice, and a pinch of salt. Mix well and set aside.
In a separate bowl, combine olive oil, chili powder, cumin, garlic powder, salt, and pepper. Add the shrimp to the bowl and toss to coat evenly with the spice mixture.
Heat the shoelace grill or frying pan over medium-high heat. Once hot, add the shrimp. Cook for about 2-3 minutes on each side or until the shrimp are pink and opaque.
While the shrimp cooks, warm the taco shells in a separate pan or oven according to package instructions.
Once the shrimp is fully cooked, remove from heat.
To assemble the tacos, place a few shrimp into each taco shell and top generously with the mango salsa.
Serve with lime wedges on the side.