The SD Link is incredibly generous. From Inazuma Eleven 2 , you can bring:
For fans of Level-5’s beloved RPG-soccer hybrid, the Inazuma Eleven franchise represents a golden era of sports anime and gaming. While the original trilogy laid the groundwork and GO introduced the fan-favorite "Arion Sherwind" (Matsukaze Tenma), it was the third installment of the GO series— Inazuma Eleven GO Galaxy —that took the concept to its absolute limit. inazuma eleven go galaxy sd link
Some Keshin (Souls/Armed) are split across both versions. For example, Keshin Armed forms of the main characters require you to link with the opposite version to find the missing "energy fragments." The SD Link is incredibly generous