The safest and legal method preferred by the modding community is to dump your own legitimate Japanese retail disc using a homebrew Wii console and apply the community English patch file manually using tools like Wiimms ISO Tools. If you are setting this up, let me know:

For collectors, modders, and fans who missed out on the original Japanese release, this ISO represents the definitive way to experience the game. But what exactly is it? Why is the keyword β€œi--- Inazuma Eleven Strikers 2012 Xtreme English Iso” trending in retro-gaming circles? This article breaks down everything you need to know.

Use a tool like Delta Patcher to apply the patch file directly to your clean Japanese ISO. This outputs a brand-new, English-ready ISO file that you can boot directly in Dolphin.

The debut of Avatar mechanics in the Strikers series, adding a layer of strategic power to matches.