User blog comment:Yoshijr/Viability Ranking if only based on usefulness/@comment-36492818-20200205042910/@comment-36515094-20200205055414

Not at all. How useful a monster is shows how valuable a monster is in a specific meta based on a certain role they can fufill or based on how well they synergize/counter very popular things in the meta. How good a monster is in general just basically judges a monster for what they have/do, but doesn't really take into account what is really popular for the meta. For example, Nikasia isn't that great in general since her moveset is bad, but in this meta she is extremely useful.

Its kinda like how in Clash Royale (if you ever have played that game) the Royal Hogs were really bad in the last meta because many counters to them were popular, but overall they are a really good card.

TL;DR Usefulness depends on other monsters while good in general depends on what the monster itself can do