When Majin buu unfuses with gotenks because the fusions wears off inside him, you see that he turns into piccolos clothes,however he also swallowed gohan so why would we downgrade all the way back to picolos fusion this part didnt make sense to me. In a different scene I also saw majin buuhan and out of nowhere he wasnt wearing the orange uniform anymore,I don't know if this is just an easter egg though.