What Christmas carol originally written in Latin can be translated as "Come, all ye faithful"?

"Adeste Fideles"

What do Lady and Tramp eat during their iconic dinner scene? Which animal swims vertically and communicates via color-changing skin during courtship? The River Shannon is the longest river in which country? What round flatbread is a staple in traditional Mexican cooking, often used for tacos? What Nintendo fighting game franchise brings together characters from various franchises such as Mario, Kirby, and Pokémon?