Its called the National Anthem, and will depend upon which country you are referring to.
Feijoada is the national dish of the country of Brazil.
Tamale is a dish native to Mesoamerica, not just one specific country.
Mexican Chicken, a national dish, is named after the Country name in the dish - Mexico! This has been called the "National Dish" of Mexico. This is often used as a spicy dish with chillies.
A famous dish from the US is chicken fried steak
Brazil
Norway
Grenada is the country where boil dung is found as its national dish
yes yellow stone was the first nation park
If you mean pupusas (the correct spelling) then that is a Salvadoran dish.
Smalahove is a Norwegian dish consisting of half a sheeps head.
Brazil