One of the most effective ways to enjoy Shadow without cheating is to use a "Clean NG+" save file. These files are typically right after the credits roll (Ending save) but with zero gameplay modifications.
Why is this the best Inazuma Eleven GO Shadow Save File for purists? Inazuma Eleven Go Shadow Save File
Community tools, such as the Inazuma Eleven GO Save Editor (PC-based), allow users to modify: One of the most effective ways to enjoy
Note: Editing must preserve the save’s checksum and structural length to avoid corruption. Note : Editing must preserve the save’s checksum
The perfect save file should have the Scout Notebook maxed out. In Shadow, this gives you access to the "Hidden Boss" team. Look for save files that boast "All Characters Unlocked," specifically mentioning the Legend Japan team and Chrono Stone tie-in characters.