Screamapillar on 22 April 2013
It is plausible. Until I just looked them up on Wikipedia after reading the OP, I didn't even know Shinen was a developer, let alone a Nintendo developer. They make the Nano Assault/ Nanostray series for DS/ 3DS.
It would be a massive undertaking for them to make a full Wii U game, though. They seem to be a pretty small studio.
The Screamapillar is easily identified by its constant screaming—it even screams in its sleep. The Screamapillar is the favorite food of everything, is sexually attracted to fire, and needs constant reassurance or it will die.
