Spongebob Ight Imma Head Out

I'm pretty sure that's the day at my school where we get to wear our costumes so me and my friends gonna go nuts even if we can't see the movie opening day

I’m going as either the nightguard from FNaF 2 or William afton. Which one should I dress up as?

I dunno. I'm either going as Monty or Foxybro (Monty if I get enough time to prepare, Foxybro otherwise because I knoe I can)