Billy Fish's story is one of ambition and the pursuit of power. He has big dreams of ruling and goes through various challenges and adventures to try and achieve that.
Barefoot Billy in the 'barefoot billy true story' might be a unique individual. He could be a person who rejected the norms of wearing shoes. Maybe he had a philosophical reason for it, like believing that being barefoot kept him more in touch with the real world. Or perhaps he grew up in a situation where shoes were a luxury he couldn't afford, and over time, it became a part of his identity.
The time when the king swallow of the Pokémon Billy learned the shadow clone in the anime was in the 186th episode of " Journey to the Magical Continent." At that time, Billy and his Great King Swallow met an electric dragon called Hei Yu. It had learned the Shadow Clone Technique. In order to thank Hei Yu, Billy asked him to go to the Pokémon Tower with him to challenge the tower master, Flying Rat. However, Hei Yu was unwilling to go because he was afraid that failing the challenge would hurt his friend. In the end, Billy successfully challenged the Pagoda Master Flying Rat and won.
Sure, Billy Bathgate is fiction. It falls within the realm of creative writing, where the author weaves a tale that may or may not have any resemblance to reality.