J. Brennan Smith is cast as Elmer, a chubby new student at the Walnut Grove school. Mercilessly ridiculed because of his weight, Elmer gravitates to the only person willing to be nice to him -- bratty Nancy Oleson (Allison Balson). In truth, however, Nancy doesn't care a fig about Elmer; she just hopes to use him to her advantage, and to that end she persuades the boy to "get even" with the other kids by becoming the class bully. ~ Hal Erickson, Rovi