A white cat with red spots all over its body. Its inner-ear and nose are dull pink. It has a gray Haramaki around its stomach and an aquamarine sphere attached to its collar. The flames on its tails are indigo. Since this Yo-Kai is a fusion of Whisper and Jibanyan, they both fight over who controls the body.
They still retain their distinct personalities, and are separated easily.
Yo-kai Watch animation series
In EP091, Whisper tried to get into a singing contest that Jibanyan was in and ended up crashing into him, creating Buchinyan. However, a photographer appeared and had Whisper detach himself for the shot, revealing that Whisper had merely wrapped himself around Jibanyan.
In EP094, Shogunyan went on a rampage due to his obsession with wanting to cut tough material and Whisper and Jibanyan crashed into each other but this time they became stuck together, so Shogunyan used a special attack to divide them, which due to Whisper crashing into Shogunyan as a result, ironically caused Bushiper to be created instead.
Yo-kai Watch: The Movie
In the anime, Buchinyan debuted alongside Darknyan as a unexpected fusion of Whisper and Jibanyan in "Yo-kai Watch: The Movie" as a means of defeating Dame Dedtime's final form, Dame Demona, formed when Whisper shoved himself into the path of the energizing blast that powered Hovernyan into Darknyan, when Nate and Nathaniel meant to solely power up Jibanyan.
As Dame Dedtime needed to be defeated, Darknyan grabbed Buchinyan and maneuvered the fusion towards a key spot, allowing Buchinyan to destroy Kyodai Ubaune with his Flurry of Furry. Following that, the flightless Yo-kai crashed into the ground, defusing back into his components.
Yo-kai Watch 2
Save a Yo-kai Cam picture to the 3DS in Yo-kai Watch, then switch to Yo-kai Watch 2 and go to Mt. Wildwood. Talk to Mister E. to receive a Select-A-Coin +. Use it on the Crank-a-kai and choose between Komasan, Noko and Buchinyan.
Selecting Buchinyan will make a cutscene play, where the player seemingly gets an empty capsule from the Crank-a-kai, only for it to pull in Jibanyan and Whisper, and ejecting Buchinyan a few seconds later. After giving the player his Medal, Buchinyan disappears, and Whisper and Jibanyan reappear, expressing discomfort over the fusion.
Yo-kai Watch the Movie: Lord Enma and the Five Tales, Nyan!
During the final chapter in the movie, Episode 5: Let's Go to the Yo-kai World, Buchinyan appears as a major role, when Darknyan throws Jibanyan at Whisper, to fuse together. This was when Zazel was at his second power state, during the big fight.
Yo-kai Watch Busters
Complete 10 Yo-kai Circles and talk to Happierre to befriend Buchinyan.