This isnt an normal world. The world is split into different regions like kanto, johto, hoenn, sinnoh, unova, rocket empire,magma land,aqua islands,galactic empire and plasma kingdom. The kanto, johto, hoenn, sinnoh and unova formed an alliance which led to formation of a majestic empire named kanto empire since kanto was the major super power. The head of the empire was Charles Goodshow who was unbeatable even though he was old. The military trained pupils in the aura academy. People have aura but only few when trained could use it as a power. The training enhances the aura level to a usable. It can also be done with forbidden techniques like the aura fruit which is ultra super rare. No one till now has tried to find it. The myth says it. Warriors who can use aura are classified into different levels according to energy rookie level to master level, the aura wielding capacity developed to level that the aura can be used to enhance weapon attacks, Thus people started training in both weapon mastery and aura.