Heat oven to 375°F.
Spray 13x9-inch (3-quart) baking dish with cooking spray. Spread 1/4 cup of the enchilada sauce in bottom of baking dish. Reserve 1/3 cup corn.
In medium bowl, mix chicken, 1 cup of the Monterey Jack cheese, the Mexican cheese, remaining corn, cumin and garlic powder. Spoon about 1/2 cup filling onto each tortilla. Roll up each tortilla tightly; place seam side down in baking dish. Drizzle remaining enchilada sauce over top.
Bake uncovered about 30 minutes or until bubbly and lightly browned. Sprinkle enchiladas with remaining 1/2 cup Monterey Jack cheese, reserved corn and cilantro.