The name of this game is to try to come up with examples of groups of villains who are either:
"FTO"-- is made of mostly or entirely of "First Time Offenders," meaning that most or all of the villains never appeared prior to their appearance in the team
"RO"-- is made mostly or entirely of "Repeat Offenders," meaning that most or all of the villains have appeared at least once before outside the formation of the team.
So "Frightful Four" would be "RO," because when the team first appeared, only "Madam Medusa" was a new character.
And "Fatal Five" would be "FTO," because only Doctor Light had appeared elsewhere.
Admittedly some team-ups don't have neat names, so it may be necessary to just denote them as "that teamup between Joker and Penguin."
"FTO"-- is made of mostly or entirely of "First Time Offenders," meaning that most or all of the villains never appeared prior to their appearance in the team
"RO"-- is made mostly or entirely of "Repeat Offenders," meaning that most or all of the villains have appeared at least once before outside the formation of the team.
So "Frightful Four" would be "RO," because when the team first appeared, only "Madam Medusa" was a new character.
And "Fatal Five" would be "FTO," because only Doctor Light had appeared elsewhere.
Admittedly some team-ups don't have neat names, so it may be necessary to just denote them as "that teamup between Joker and Penguin."