Wibble Wobble: How do I unlock Hidden Stage 15 in Yo-kai World?

How do I unlock Hidden Route 15 on Yo-kai Watch Wibble Wobble?
Create 10 or more bonus balls.

This is hard one even if you have Dracunyan or Signiton on your team. To unlock Hidden Route 15 on the Yo-Kai World section, you need to create 10 or more bonus balls on Stage 181. The problem is that you will either defeat Rhinoggin and his team too quickly, or get defeated before you can create 10 bonus balls. This hidden stage takes careful planning of your Yo-kai team, a great strategy and a lot of practice, only to disappoint you with Copperied.