What is Proxy Battles manga?
In our terms, a proxy battle is a battle where humans use creatures/robots to do the fighting for them, either by commanding those creatures/robots or by simply evolving them/changing them into battle mode. Often the training aspect is also involved, or in some cases the proxies are nothing more than holographic representatives of some other variation of competition (like for example a card game). While many popular shounen anime fit under this category, it's not limited to shounen anime.