Yes, you are absolutely allowed to wear Minnie ears at Universal Studios, but it is a common "theme park faux pas" that often draws lighthearted jokes from Universal Team Members. Unlike the strict rivalries in professional sports, theme parks do not have rules against wearing a competitor's merchandise. You will see many guests wearing Disney ears at Universal and, conversely, guests wearing Harry Potter robes at Walt Disney World. However, because Universal prides itself on a "more irreverent" and edgy brand identity, don't be surprised if a Team Member at a ride entrance or a character performer makes a witty comment about you being in the "wrong neighborhood." In 2026, with the opening of Universal Epic Universe, the competitive spirit has intensified, and many fans have started a trend of "crossover" outfits. Just remember that while you can wear them in the park, you will still be asked to remove them on high-intensity rides like VelociCoaster or The Incredible Hulk Coaster for safety reasons, as they are considered "loose articles" that could fly off and injure other guests.