Because all Anti-Fairies are the opposite of their fairy counterparts, instead of being smart and hot tempered like Wanda, Anti-Wanda is dim-witted and always happy, just like Cosmo. Her IQ is so low that she doesn't know how to eat properly, and as such she eats with her feet (instead of her hands like normal people), and much like Cosmo, she foils plans without knowing what's going on (Anti-Wanda may also be even more stupid than Cosmo as shown in some episodes). She has a few missing teeth and speaks in a hillbilly and county Southern accent.
Anti-Wanda resembles Wanda, but her color scheme is dark blue and black. She has bat wings and a black crown like all Anti-Fairies. She has pink eyes like Wanda, although she has missing teeth and the rest of her teeth are crooked. She also does not wear any shoes because she uses her feet to eat sandwiches.
Anti-Wanda speaks in a southern hillbilly accent and eats with her feet. Her stupidity is often the cause of trouble for Timmy and her husband. It is unclear whether or not Anti-Wanda is a real threat, because usually she is just following her husband's lead. She is not the complete opposite of Wanda, because both love their children.
Anti-Wanda is reckless and incredibly dumb. Wanda is smart and not reckless.
Anti-Wanda gave birth to Foop. Wanda did not give birth to Poof, instead it was Cosmo.
Anti-Wanda doesn't nag anybody, but she does end up annoying people with her eating habits. Wanda does nag people.
While Wanda eats with her hands, Anti-Wanda likes eating sandwiches with her feet.