>>53327486Think of it differently, In-universe someone who found the fossilized remains of BB used them as inspiration for pokeballs, similar to someone who found the remains of a Bastiodon and was inspired to build a fortress.
If you want a more forced explanation, what if in this world naturally grow apricorn with the coloration of the current pokeball and some predators imitated that shape to attract prey.
It can also only be a coincidence as it happens in our world.
