12. The origins of HydreigonIn an interview with Ken Sugimori, he revealed that he intended for Hydreigon and its pre-evolutions to be designed as techno-organic tank-like Pokemon. Ultimately the designs didn't really work, so a different motif was chosen.
The three Pokemon were based on Yamata no Orochi, the legendary eight headed-dragon/serpent that some of you may be familiar with as it is sometimes depicted in videogames like Okami. According to Sugimori, though Hydreigon has one true head, its oddly shaped wings and hands are meant to represent the others, and the odd purple lines across its body are actually a nod to its original tank design, as they resemble caterpillar tracks.