In a medium skillet, heat the olive oil over medium heat. Add the shredded chicken, chili powder, cumin, garlic powder, onion powder, salt, and pepper. Stir to combine and cook for about 5 minutes until heated through.
While the chicken is heating, warm the corn tortillas in a separate skillet over medium heat for about 30 seconds on each side until pliable.
To assemble the tacos, place a generous portion of the seasoned chicken on each tortilla.
Top each taco with diced tomatoes, shredded lettuce, diced red onion, queso fresco, and chopped cilantro.
Serve with lime wedges on the side for squeezing over the tacos.