Odd Creature Out is a game which is featured on several Monster Mania cards.
Rules[]
The player is shown several different groups of animals; these are always groups of 4. In these groups, the animals will all seem to have something in common, but one animal is the titular odd one out the player must find. This could be based on creature types, relatives, diets, or unique abilities, and the keys on the bottom of the card will give an answer explaining the difference.