Ah! Sorry, Haven't been on DA. His horn. You know which piece it it, right? Attached to just above the nose. it would actually be folded twice, to make a triangular pyramid.. And then you put the face pieces on around it.
I'm horrible with explanations; perhaps this picture will help you understand what I mean?
xD I printed mine on four pages; he came out about five inches tall. I love my nidorino; he, meganium, and poochyena are the only papercrafts still standing in my room. The rest were all crushed somehow. >: