The original DS versions of Inazuma Eleven 1, 2, and 3 were officially localized in Europe. These are fully playable in English and are compatible with most DS and 3DS hardware.
If you are looking for a 100% English experience, enthusiasts on Reddit recommend the following alternatives: Inazuma Eleven 1-2-3 Endou Mamoru Densetsu English Patch
The Endou Mamoru Densetsu compilation is highly sought after because it offers the "definitive" way to experience the original story. Key benefits of this version over the original DS releases include: The original DS versions of Inazuma Eleven 1,