There is no official name for this phobia!
I'll try and work it out..
Habiliophobia - The fear of getting dressed
Zoophobia - The fear of animals
Xenophobia - The fear of other people
Xenohabilzoophobia - The fear of other people getting dressed up as an animal.
Now I put my stamp on that!
Poyol
Coulrophobia is actually the fear of clowns. Although I don't believe there is actually a name for a 'costume character' fear, Masklophobia is a fear of people in masks or mascots.
Masklophobia is a fear of mascots...
halloweenafobia
Samhainophobia is the phobia that means you are afraid of Halloween.
You may get Samhainophobia.
Autophobia
Heliophobia.
PenisJacker
Musophobia
Agoraphobia
There does not appear to be a phobia term for the fear of being confused. However, phobophobia is the fear of being afraid.
Samhainophobia is the name of the phobia relating to the fear of Halloween.
Obesophobia or Pocrescophobia.
Thanatophobia or Thantophobia
Anablephobia.