Usapyon B is Usapyon in Blasters gear, just like Jibanyan B and Komasan B, only Usapyon's suit allows him a hoodie to simulate his standard suit's helmet, and has a pair of simple, round goggles on his forehead.
His suit specializes in Terror Time. He can also activate Emperor Mode in Blasters, by touching a Great Orb.
Usapyon can wear the Usasuit B and turn into Usapyon B starting with the Moon Rabbit Crew update by completing the mission "The Yo-kai Held on the Moon". Usapyon B can activate Emperor Mode upon being exposed to the Great Orb, although this does not apply to the Invader Chip.
After befriending Jibanyan B and Komasan B. Usapyon B can be befriended by finding in front of a record store in Springdale Street in New Yo-kai City and battling him once a day. (This can only be done in both Red Cat Corps and White Dog Squad are both linked. Nothing will happen if you just have Jibanyan B and Komasan B in your medallium.)