Thornyan in Yo-kai Watch 2

The player has to go to the apartments in Shopper's Row, where and Coughkoff and Roughraff are arguing over who is more spiky. To obtain Thornyan, the player has to speak to Coughkoff and say he's the spikier one. He will then fuse with Jibanyan to form into Thornyan, the fusion breaking apart after Thornyan gives the player their medal. This encounter is unlocked during Chapter 3 "School Is Strange" in the main story.