The Vitality Ranking is a type of ranking in both Tomodachi Collection and Tomodachi Life. It states that it looks at Mii's Vitality. It says "Check out who's got the best balance of mind, body, and spirit. The full birthday of a Mii is required to be in the Vitality Ranking. Sometimes Miis come in joint so the number is not alway the amount of miis u have