What is the name of the taco filled with crispy fried pork skin?

The taco filled with crispy fried pork skin is called tacos de chicharrón.

Chicharrón is pork skin, often with attached fat and sometimes meat, that is fried until crisp. In Mexican tacos, the crunchy pork can be tucked directly into a tortilla or combined with a cooked preparation such as chicharrón en salsa verde, in which the pieces simmer in a green tomatillo-and-chile sauce and become tender rather than remaining fully crisp.

Tacos de chicharrón may be served with avocado, cheese, hot sauce, onion, cilantro, or salsa. Regional versions differ: northern Mexican chicharrón is often meatier and resembles fried pork belly, while southern styles may emphasize pork rind. The term chicharrón itself is used across Spain, Latin America, the Philippines, and other regions with Spanish influence.

This taco is easy to confuse with tacos de cueritos. Cueritos are pickled pork skin, not fried pork skin. Carnitas are generally braised or fried chunks of pork, while tripa refers to grilled or fried intestines. Those fillings can all appear in tacos, but they are distinct from chicharrón.