Stereotypes are an integral part of the gameplay in the Nintendo Steréomon series. The Stereotype determines what type of attacks Steréomon will be weak to and naturally strong against. Steréomon as a general rule tend to learn moves that are the same stereotype as itself, though other sterotyped moves are often learned to. The most prevalent of these would be the normal stereotpye, which all but a select few Steréomon learn moves of at some point. See below for a match-up chart of stereotypes:
So you meant them kind of stereotypes.
Well, ..umm, black people are .... black? This isn't really my line of expertise.