He read about the Keshin system, avatars of immense power that players summoned on the field. He read about the Mixi Max , a mechanic allowing players to fuse their aura with historical figures or teammates. In the "Xtreme" version, the modders had balanced the stats so that every match was a battle of gods.
Here is (for personal backup or emulation):
: Users can download an ISO patcher that automatically creates a new "Xtreme" ISO from the original file. Riivolution Dolphin Emulator
Inazuma Eleven GO Strikers 2013 Xtreme: The Ultimate Mod Experience
