Well, so much for that idea...

In the newest episode of Yu-gi-oh Arc-V (in Japan at least), Yuya's opponent played the first Pendulum Fusion monster ever. Granted it's level is too high to Pendulum summon (unless Pendulum Scale 13 does become a thing), but this means my theory of Yuya making the first Pendulum Fusion, and making it a Performapal Fusion monster is no more. Oh well, guess not all theories turn out to be right.