Barney the Dinosaur
The purple dinosaur that somehow became the most beloved and most despised children's television character of the 1990s — a phenomenon so massive it spawned both merchandise empires and playground backlash that made "Barney bashing" a genuine pop-culture sport. The closing song "I Love You" (sung to the tune of "This Old Man") made every parent's brain simultaneously swell with affection and shriek in agony.