"Animation Dress-up" can be translated into "cosplay" or "costumeplay" in English. "cosplay" is a popular cultural phenomenon, which means that people play their favorite roles by putting on clothes and accessories in comics, games or other fictional worlds. This kind of dress usually appears in animation exhibitions, game activities and other related occasions.
"costumeplay" puts more emphasis on clothes and dressing, which means that people wear specific clothes and accessories to play a certain role or image.