Seasons 1 and 2 only

This category is for major and/or recurring characters that appeared in Seasons 1 and 2 only and were never seen in seasons 3 and 4, as seasons 3 and 4 were mainly handled by CN Studios with no involvement from series creator Genndy Tartakovsky or other head writers.

NOTE: This category is not for season 1 and 2 episodes as they already have their own separate categories.