How can I play online in Yokai watch blasters?

I don’t have idea that how can play online in yokai blaster?Who can help me?

In order for us to provide better support, we need to see the log generated by citra. This guide will walk you through how you can obtain the log file: How to Upload the Log File

But how can I active the StreetPass in yo-Kai Watch blasters ?

You can’t. Citra doesn’t support Streetpass or Spotpass.