Dee-Dee twins in Batman Beyond: Return of The Joker.

The Dee-Dee Twins, Delia and Deidre are completely dumb. The love the thrill of being a part of the Jokerz Gang and think it's a large charge to be working for the big man himself, The Joker. The Deeds are olympic-level retards, there ugly ass crap. Many an enemy has underestimated their playful, raggedy Ann-like smiles only to wind up in traction later.