In some episodes, Mordecai wears outfits.
Though Mordecai does not wear clothes, he is not shown to be able to be nude, so he may not need to wear clothes or chooses not to, due to a term of wearing no clothes started by Rigby at young age. In The Power, he is shown wearing a black coat with a white shirt underneath, with black pants and shoes. In Mordecai and the Rigbys, Moredecai's future self is dressed up in a red jacket, black pants, and shades. In the same episode, Mordecai was wearing his Mordecai and the Rigbys shirt. In "Access Denied," he is seen wearing a white shirt and red tie. Mordecai's Cool Outfits were seen in Cool Bikes. These are all of the outfits that Mordecai tried on at Das Coolest. These outfits were not his final outfit at the end.