Avatars:
✿ Tenma’s Avatar, Demon God Pegasus, has an evolved form, named Demon God Pegasus Arc
✿ Hakuryuu from Shine version’s Avatar is Holy Beast Shining Dragon
✿ Shuu from Dark version’s Avatar is Darkness God Dark Exodus

3DS Dark VS Shine Specifics
Dark:
✿ Endou’s wife is Fuyuka
✿ Characters involved in the story: Kazemaru, Fudou, Kabeyama

Shine:
✿ Endou’s wife is Natsumi
✿ Characters involved in the story: Hiroto, Midorikawa

Upcoming Anime developments:
✿ Raimon’s 2nd opponent in the Holy Road is Hakuren Jr. High
✿ Fubuki is Hakuren’s former trainer, but he’s unable to protect Hakuren from Fifth Sector
✿ Yukimura Hyouga’s Avatar is Overpowering Snowfall Saia (Thire? Sire?)

Other game features:
✿ New scout system. te buy “kizunacks” (kizuna means bond, combined with “snacks”?) from “Community Masters” around the Inazuma Eleven world. te will also need to find specific items to recruit certain members.
✿ Certain stadiums are equipped with additional obstacles such as tornados appearing on the field o plots of ice.
✿ The training spots to quickly boost stats now involve a slot machine. te could get extra boosts from the slot o end up failing.
✿ Some features from precedente games: Original tournament lineups, hissatsu tactics

New Wii game:
✿ Inazuma Eleven Strikers 2012 Extreme is scheduled for release on the Wii on December 22, 2011.
✿ It features the main characters from Inazuma Eleven GO and the Inazuma Eleven GO movie.
✿ The 12 starting characters for Raimon’s team in GO are confirmed to be in the game (Tenma, Shinsuke, Tsurugi, Shindou, Kirino, Sangoku, Kurumada, Amagi, Minamisawa, Kurama, Hayami, Hamano).
✿ Avatars will be involved in the gameplay.
✿ Characters from the original Inazuma Eleven Strikers game are also included (no details on how many characters specifically).

fonte : link