Sour Sam
Sour Sam is a relatively minor villain from the Care Bears franchise and was portrayed as a human male of unknown age who had a nasty attitude, he disliked people being nice and as a result was a natural enemy of the Care Bears (who existed to show people the importance of sharing, caring and so forth).

In order to put a stop to this Sour Sam invented a strange (and apparently magical) type of pie which he named Crabby Apple Pie (a pun on crab apples) - which made everyone who ate them become ill-tempered and generally dislikable, however as can be expected his plans were foiled by the Care Bears and he has not been shown to be an active villain anymore (in fact he seems to of been a one-shot villain, at least in the cartoon series).