You can find pre-patched versions on hShop for easier installation. : Use Citra or its successors like Lime 3DS .
You want the conclusion of the GO trilogy in English and don’t mind fan translation patching. inazuma eleven go galaxy supernova english patch new
The fan-made translation for both Big Bang and Supernova is complete, covering the main story, post-game, and menus. You can find pre-patched versions on hShop for
"In 72 hours, the Data Void will consume this reality. The only way to seal it is to win the Stardust Match. You are the Captain. Find 10 others. Play. Or both worlds—pixel and flesh—will be erased." covering the main story
The Stardust Scramble